Otis King's Pocket Calculator

[@Dafoodmaster]

1921 teachers were like "oh what, do you think you'll always have a calculator in your pocket?"

[@ChrisStaecker]

This is great- never seen one before.

[@le9038]

this was honestly the most interesting thing i have seen today...

[@exulan9570]

Just got recommend this, this vid will blow up soon

[@itzlagging]

so did I, I have never been this early before lol

[@mokopa]

I bought one at a flea market today. It came in its original box and includes leaflet and instructions. Serial no V6524, and it is in absolute mint condition - literally never used. Which is particularly nice is that mine was distributed here in South Africa by a local company, and the instructions are localized, too!

[@gesus44]

Awesome video, congrats on 1K subscribers! Hope to see more videos soon.

[@GoodGuyJah]

Extremely interesting I love seeing old items and inventions thanks for the video :)

[@k0sm0smm4]

Wow this is a great channel I just discovered! Really great introduction!

[@GrumpyTim]

I've been wanting to get one of those Jaap - some of the ebay prices seem a bit silly compared to a fully blown electric mechanical calculator!!! Nice to see how they work - I'd never seen one in action before.

[@mr.airsoft8295]

That's a cool old mechanical calculator design. Interesting video.

[@Salsmachev]

I really like the design of this, but it's too bad it only has C and D scales. My beautiful but dinky little KL-1 manages to have an A scale, S scale, T scale, and CI scale on an object the size of a pocketwatch. If you could fit at least that many scales onto something with this basic design, you'd have a real contender for sexiest slide rule.

[@brucewilliams6292]

This was interesting. Thank you for sharing. It is stuff like this that makes KZbin impressive; it is unlikely that I would see a device like this.

[@karl-heinzbirkenbeil1331]

Hi Jaap, nice presentation. I have a model K, where the paper is wrapped a bit out of place and a model L that matches perfectly. Greetings from Germany 🇩🇪

[@jaapsch2]

Thanks. I decided not to go into detail about the various models in the video, but of course that can all be found on my site.

[@emdxemdx]

Cute. A slide rule with a constant... :)

[@davidjack990]

My old maths teacher advised 'always keep your fingers off the numbers'.

[@sandwich2473]

very fascinating :O

[@tjhunnicutt1102]

I love this

[@zackaryhouser3701]

This is going to blow up

[@TheReagorBrothers]

Ha Ha!

[@karolus28]

awesome

[@steveelliott8640]

I got one in 1970 when I started work.

[@camren9198]

i have one of these