Hello, can anyone suggest where I can purchase the replacement bladder that would fit a parker 45?

Thank you so much! This is very helpful

Interesting topic...Anybody knows Which size does Waterman CF converter take?? Thank you

Thank you, that was very informative

Nice video! I'm currently trying to restore a US Mk1 Parker 51 Aerometric which belonged to my grandmother (I believe she bought it new). The breather tube is blackened except at the section where it connects to the feed, but luckily unclogged and unbroken (I've run through it with a pair of steel strings and checked the length with a caliper - it's 69.6mm long, right on spec). I've ordered a replacement stainless steel breather tube, but it seems the original still can be used. Did you replace the breather tube in the pen under restoration in this video, or did you clean the original silver one? The breather tube as shown e.g. from 7:20 onwards (inside the new sac) seems pretty clean. If you did the latter, how did you do it? I tried polishing it with some Silvo - it did get somewhat clearer but still far from shining new.

Thank you, buddy. I just learned something new. This was great information.

I fix mines using shink tubing for wires or polypropylene soda straws (you have to melt one side) 🤣. Prices for sacs are ridicolous here and they are not really needed for squizing anyways. I think I could even make "vacumatic" sacs using other sorts of soft pipes or latex.

Thanks very much for all the information put forth in this video. I am planning to purchase a vintage Parker 51 very soon and will be much better informed as result of your video. Thanks!

I have an old classic ever sharp from before 1924. However, it is missing the splined tip. Is there somewhere I can purchase this piece?

Do you have any info on ome type of vintage mechanical pencil made by salz? Ive tried to find guides since i have one?

Wonderful! Thank you!

I just found few super weird pencils on online auction, one is eversharp, other autopoint, others have tip cone split in half (maybe 5mm deep slot), other look like small celluloid pencil with possibly 2mm lead. But who makes or sells 1.18mm/0.46" lead in Europe? Because common are 0.5mm. Uncommon are 0.3 and 0.7mm or 2mm and thicker for clutch pencils. 0.9mm exists, but I have them only for 1970s mechanical pencil and i was really surprised that 0.7mm falls out. Koh-I-Noor has 0.3-0.5-0.7-0.9 and then 2-5.6mm Faber Castell has 0.35-0.5-0.7-1(0.9)-1.4-2 Rotring or Staedler seem to have 0.5-0.7-1-2 Also I wonder if 1.18mm is still manufactured and if old ones are in good condition. Cause I found some leads and my parents drawer and they were all leaking some kind of glue or wax. And on 0.9mm lead was stuck and I had to push it back by a pin and clean pen mechanism with 0.5mm toothbrush

I think this is a Parker 21 not a 51

Are they still made in a modern design? Or is it easy to make yourself?

Ahhhhh! Thank you!

I love silver, especially when used for fountain pen bodies, but it seems an odd choice of material for a breather tube that is constantly immersed in a water based liquid, especially given its reactivity and propensity to oxidize. I wondered why Parker chose silver as the material for their breather tubes in the 51. Parker has made some strange decisions over the years, and this seems to be no exception, and it's more expensive than stainless steel, although it's possible that silver was actually cheaper than stainless at the time that they used it.

What would an 18k solid gold version of this pencil be worth?

I still can't get mine open

As noted, this same method works for many different brands of metal-bodied converters. Today I repaired a Pilot converter from the 1980s, using the shaft of a drill bit to support the plug while it was wiggled out with padded pliers (it was either 5.5 or 6mm -- use whatever is a snug fit). The replacement sac was a #14 in transparent PVC, which was a tight fit. #15 would be better but is a size only available in latex and silicone, not PVC.

Hi David, this is a very helpful video. I am in the process of restoring my Parker 51 (1950 Mk1 UK) and wanted to replace my breather tube. The current one looks black in colour so potentially ebonite? - can I replace this with a steel breather tube?

Mine is from between 1920/1933 many older but giving in 1933 it was probably giving to a Jubilee I need to insert this lead into the front because what pushing the lead looks like a tool to push the lead when it stuck I really love these older pencils.

Hello friend, this is Isaac, I speak from Brazil. What is the function of the breathing tube? Mine broke, does it work without?

I finally figured out how these pencils work. 3:47 4:27 The inside of the exterior barrel, and the outside of the propelling pin, (that freely moves up and down in the inside barrel) must, both, have spirals. So, when the inside barrel turns, the propelling pin, (in the inside barrel), turns too, and moves forward through the exterior barrel, like a screw moves forward through a nut. It's simple, but ingenious

Do you know if the shirt/purse pencil also has an eraser? I can’t get the back off but it looks like an eraser is there.

Very thorough and excellent presentation.

Very useful tutorial. Thanks!

This type of converter name is

Where does one buy lead for this type of pencil

Great video. Liked it a lot. Most educational.

😓 𝔭𝔯𝔬𝔪𝔬𝔰𝔪

Hi David, im a little confused. Your web site you recomend " For silicone sacs, we have found that a stronger and more reliable seal is provided by a silicone sealant such as Devcon" ? So do we use shellac or sealant ? Cheers

Sheaffer Snorkels sometimes suffer similar shenanigans. I made a not-quite-as-thorough-or-well-produced video about that a while ago. kzbin.info/www/bejne/pJisf3iDo5ageZI

David, what would you have charged for this 51 refurbishment?

Great info about a pencil that just about every collector has a few laying about!

The demonstration of judicious used of heat should be required viewing for all interested in pen repairs! Well done.

Thanks David for documenting your profound experience and expertise and sharing it. Such a huge resource for current and future custodians. Very much appreciated and kudos to you.

This is an expanded video followup on a blog post from a few years back, which can be found here: vintagepensblog.blogspot.com/2021/08/yes-aerometric-parker-51s-can-have.html

I found the part just below the thread would very likely shrink if you overheated it even slightly, especially on cheaper celluloid pens. So I warp some paper tape to keep this part from being heated.

You have a new subscriber. Great content with great quality. Regards from Lisbon/Portugal

Great advise, I learned the hard way myself.

Does this method work for parker 21

I'm doing my first sac replacement and this was very helpful. I was confused about measuring the outside diameter of the nipple vs the inside diameter.

How does one convert the fractional drill gauge holes to the proper ink sac size?

Where do you get the ink sacks from?

You absolutely legend! THANK YOU!!!

What a legend~! thank you~!

Great information, David. I'll share this to get some eyes on it.

Thank you for posting this! It'd seem that with an accurate measurement of internal barrel length, and a *close enough* match to the nipple diameter, a person could make this repair fairly quickly, if a dead sac were the only problem.

At last - a really useful, practical guide that's easy to follow - thanks very much!

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