I have one ans i xannot understand it still. How do you get the toral ending nunber?

I can't understand please add 2 numbers it's not showing number

The multiple carry at 3:50 is deeply satisfying!

Does it come in the ((OoRrIiGgIiNnAaLl)) box?

It doesn't look that useful, other than the first number you are totally dependent on counting the presses.

Thanks for the trip down memory lane! I still have my dad's Addometer that he used in his photographic business in Danville, Illinois in the 1950's. I remember, as if if were yesterday, as he pulled out the stylus and quickly turned the wheels adding up the price of the customer's photos, and I suppose tax for each order. He would take the calculations and then hand-write the customer a receipt. I appreciate you popping the top and explaining the marvelous mechanics that made it work. Too bad the person or team that came up with the design didn't get their names listed on the back. Great video!

congrats on the former clock world record of 38.97 also cool machine

Hello Jaap, I found this channel through your work on Kociemba's Algorithm on your website. Are you still doing research on Cube Theory? Best, Jeremy

I was a comptometer operator in the late sixties. I love your videos about these lovely machines. Thank you.

Fantastic machine. Fantastic human brain that created it.

Excellent video and a very cool machine

This one has ALL the bells (2) and whistles (0). That tabulation feature also seemed unusual. Really nice, and smooth operation.

Nice demo of the two bells! Very strange.

Lovely

Another great video. I much prefer it when you use example numbers that are convenient powers of two - it makes it easier to follow for those of us who are only good at maths for certain combinations of numbers 🤣

wow, what a beauty

Is it a Facit Standard, or a Facit 10? I believe the Facit 10 has tens carry on the counter, and the Standard does not. The visual difference between the machines is that the 10 has a flatter profile above the counter to accommodate the auto-reverse mechanism. I have machine 10-9966, which has the rare added refinement of a counter direction override button on the right hand side in front of the crank.

It really is a great machine. Very well built.

Nope. Just a whiz-wheel.

Why do all the numbers in the 2nd digit have small dots on the left side?

all i see is a cool skilsaw blade that just might disburse sawdust even further than most....

Was it possible to move it in reverse direction for subtraction, or was it addition only?

I am not really impressed. You cannot add numbers larger than 99. You can do that mentally. At home we had a sort of similar device with a stylus, but it could add or subtract numbers of 9 digits or so. And it was more compact.

Nifty.

At 3:43 the "add these figures in five seconds" part is false advertising. It would take you about 30 seconds just to add the nine pound values, and that time doesn't even include the shillings and pence, nor the conversions.

Why calculator when you can callQnow?

should also be noted that it can be used to subtract as well, if it adds then it subtracts too since they're kind of linked.

It's a good thing it's not easy to make mistakes, and with it's compact design you could easily fit it into you pocket (your one foot wide pocket), how neat.

I just bought 20 pocket calculators for a buck plus tax. Rechargable with a simple hand held device. The delete or clear button is made of rubber. They're called #2 pencils. As a side note the term computer and possibly calculator used to be a job title for the people doing the math for various tables used for actuarial, statistics, ballistics, astronomy etc.

That is simple and beautiful at the same time.

Wozu braucht man ein Gerät um zwei maximal zweistellige Zahlen zu addieren? So dumm kann doch keiner sein?

Very neat

Average Englishman when trying to buy a cup of tea: "well thatll be 1/74th a stone and 4 wheat curmudgeons"

Subtraction looks prone to errors. Appears to be optimized for adding large quantities of numbers. I like the zeros when cleared. The error lock is brilliant.

It's a Pi based calculator!

It even has force feedback to notify the operator of overflow!

I never understood the English currency system, and I wonder if they still use it, or have they gone to the Euro?

If they added one more ring of numbers on the outside going from 99-1 you could also subtract. Missed opportunity. Neat device though.

I never realized that some of those calculators you show are more than 100 years old. That's crazy. The fact that you also got the original instruction manual in one piece is also wild. Think about 100 years from now when the Rabbits R1 will be an relic of the past.

Do you share the price you paid for the items?

Britain before the 70s currency decimalisation. Screw you foreigners! 😁

Also have in good condition (almost new)

That is very basic indeed - long-crank, but otherwise still the original machine. Weir how slow/little Odhner innovated, compared to eg Brunsviga. I've a 1908 Ag imported by Ruys. That has an interlock beteeen carriage-shifting and rotating the drum, but not much more :) By the way "ouch!" to hear those registers crunch! My machine also was very 'hakelig'. The escapement-levers in the register are soft steel and when these are worn from the number-wheel gear sliding over it, the pressure angle changes very quickly to something that brakes the movement. On my machine I reduced the problem a little, by very careful re-filing the worn dimpled areas flat again. Still it's mostly a static item, not for frquent use for sure :-)

I just found a model KA on FB marketplace today! The mechanics all work great (although it’s hard to turn manually without a crank 😅). I have no idea if the motor works or not, and there’s a wire or two missing as well. It has all the bells and whistles though! It even has a division mode (which I have no idea how to use lol). I picked up the Monroe with a Burroughs Class 1! I’m excited to be starting my collection 😁 your channel (and website) are a huge part of why I’m interested in these. Thank you for documenting your experience!

I have one of these and I can't find the serial number, it isn't above either monroe decals and I don't see anything in the light telling me it is simply hard to read. Is there anywhere else that the serial number could be?

Hi there, i recently bought one of these machines and was wondering what sort of ink i should put onto the ink roller?

Could someone perhaps tell me where, in the Netherlands, I could have one repaired/serviced? Mine has completely seized up. Would love to have it in working order :)

I had a Sumlock Comptometer it was electric though,l worked in an Accounts Office for 10 years in the 70's and 80's

Mine was electric was a comp.operator for about 10 years.

My dream machine would be the double pinwheel (don’t remember which maker) for artillery. It is ideal for calculating coordinate pairs. Put sine on the left, cosine on the right, crank up the hypotenuse length, it computes the other 2 sides. Given I can key it into computer software and get an instant answer but not as much fun, too easy. The machines can operate in opposite directions too which is useful since there are 4 quadrants: +,+; +,-; -,-; -,+