What kind of tool is this?

[bojan1990]

Hello,

I stumbled upon a strange tool, I suspect it has to do something with watchmaking. Any has idea what kind of tool is this?

Also, I am interested in watchmakers tools (especially older ones). Any book, source, link to read more about it?

 

[jguitron]

It’s a crown and split stem extractor!

Nice find [emoji1303]




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[dadistic]

Well, how's about the 1899 J.H. Purdy Catalog?

JHPurdyCatalog.pdf

[StuartBaker104]

Can’t see how you'd use that to remove a split stem and I can’t get the JHPurdy catalogue to download, but that looks more like a clock hand puller to me.

[bojan1990]

Dadistic, thanks for the book, it looks great.

This looks similar: https://www.youtube.com/watch?v=cQUWNiQtT-I

[dadistic]

On 7/19/2018 at 9:28 AM, StuartBaker104 said:

Can’t see how you'd use that to remove a split stem and I can’t get the JHPurdy catalogue to download, but that looks more like a clock hand puller to me.

The catalog is also available here -

https://archive.org/details/20thcenturycatal00purd

[nickelsilver]

If you look at the bergeon tool in the video the "fingers" pull back, no center screw. Makes sense. The tool in the pics presses in the center, almost certainly a clock hand puller (or small gears etc. where pressing on a shaft while pulling around it makes sense).

[dieale2]

On 7/26/2018 at 1:10 PM, nickelsilver said:

If you look at the bergeon tool in the video the "fingers" pull back, no center screw. Makes sense. The tool in the pics presses in the center, almost certainly a clock hand puller (or small gears etc. where pressing on a shaft while pulling around it makes sense).

I found on eBay a somewhat similar device. The seller claims it is a hand puller which makes sense to me.

I am a bit confused on the screwing bits since if you are pulling hands, you probably don't need the screwing function. I guess it's more gentle if you do.

I am guessing it's a hand puller.