Internet Horology Club 185
Interesting Waltham

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/1086047761/m/4933901287

April 05, 2014, 19:04
Robert V. Jones
Interesting Waltham
Don't know what to say about this watch. I do not believe it is an original crystal plate from Waltham but rather maybe a watch school project. Any thoughts or info would be appreciated. I have seen the crystal plate watches before in 16s and 6 size this one is more like a 10-12 size.




tymekeeper005
April 05, 2014, 20:17
Steven Ford
Rob,

The layout looks like the 10s keywind.
Same shape balance cock.

Pinned on dial, and 4 plate screws.
Is that a solid balance wheel?

Very interesting! Looks like a keeper to me.

Nice watch!

Steve
April 05, 2014, 20:55
Robert V. Jones
I agree Steven that's the reason I said 10s but it has been recased in what looks to be a newer 12s base metal case.


tymekeeper005
April 05, 2014, 21:57
Kevin Moodie
Rob,

is the clear material plexiglass, or glass? I sure wouldn't like to have to cut and polish quartz crystal for gilt gears and settings.
.

Kevin
April 06, 2014, 00:06
Robert V. Jones
Good question I am not sure I will have to look closer at it.


tymekeeper005
April 06, 2014, 07:36
Eugene Buffard
A hot needle will let you know.
April 08, 2014, 17:35
Robert V. Jones
Well I believe it is plastic so as I originally thought it must be a project watch.


tymekeeper005
April 08, 2014, 19:18
Samie L. Smith
Robert i think it is very pretty i like it even if plastic.
April 10, 2014, 12:34
Paul D. Trombley
It's pretty impressive actually. A new spin on skeletonizing a watch.

I have a hard enough time maintaining alignment and clearances with the factory parts... I can't even imaging the tolerances on targeting the wholes that needed to be drilled to fit the jewels and screws and still expect this thing to go back together and run.
April 10, 2014, 13:54
David Abbe
I agree with Paul as to the effort to fit a plastic top plate for the train. In comparing Rob's posted watch to a factory 18K cased version that passed through my collection, the issue becomes even clearer, as the plastic plate version has an un-jeweled pallet fork due to the severe limitation of drilling plastic with closely spaced holes.

Another thing of note is that this movement is a variant with a pinned dial (but a missing case screw) and the mainspring click spring located under the dial plate rather than assembled to the top plate, making this plastic conversion simpler.


April 10, 2014, 15:41
William D. White
I agree that it's plastic, most likely acrylic or polycarbonate. This is very disagreeable material to machine due to a very low melting point! I think I recognize the jewels; these were sold through S. LaRose and were from the Elgin factory. They were synthetic rubies set in un-sized and un-finished cylindrical brass settings.

William
April 12, 2014, 11:33
James Parlow
nice
April 12, 2014, 12:06
Gary E. Foster
I like it, imagine the skill it took to fashion it.
Gary