Goal: $300, Received: $215.00 (72%) Contribute Now
Donate whatever you can or Join the 14,000 other NAWCC members for only $80 (plus $10 for hard copy publications). Check it out here.

Results 1 to 5 of 5
  1. #1

    Default Unusual jumping mechanism, Elgin(?)

    I bought this identified as an Elgin, but don't see much to support or dispute that. It appears to be a 16sz jumping mechanism, but not an incomplete movement, since there aren't nearly enough holes in the baseplate. There appear to be 4 jewels (though there may be a jeweled pin for 5, I haven't checked). The escapement appears to be all steel, both lever and wheel, and the teeth of the wheel are beveled in a way I can't photograph. The basic flow seems to be steel flywheel/attached f-shaped blue-steel piece rotates CW, provides impulse to a gear (one directional, the teeth are not symmetrical but more like a saw blade) at the top of the escape-wheel shaft.

    The f-shaped blue steel piece kinda looks like jumping-second mechanisms I've seen before, but other than that, I've got no ideas. There doesn't seem to be any way to input/extract power except the steel flywheel (2 o'clock, second image).
    Anyone have any thoughts?

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Elgin bottom.jpg 
Views:	1760 
Size:	299.8 KB 
ID:	336991   Click image for larger version. 

Name:	Elgin top.jpg 
Views:	148 
Size:	312.6 KB 
ID:	336992  

  2. #2

    Default Re: Unusual jumping mechanism, Elgin(?) (By: amacks)

    The triangular hairspring stud is what Elgin used for 90 years, from the first keywind watches in 1867, all the way till about 1955. Hairspring overcoil shape would also be a good indicator.

  3. #3

    Default Re: Unusual jumping mechanism, Elgin(?) (By: GeneJockey)

    You got an interesting piece there! The serial number font seems to be from Elgin as well. The undecorated balance cock would, to me, indicate a factory prototype as opposed to an individual experimenting with Elgin parts. I see the resemblance to a jump mechanism. I wasn't aware Elgin ever produced one. Perhaps this is as far as they got? Interesting find!-Cort

  4. #4
    Registered User Jerry Treiman's Avatar
    Join Date
    Aug 2000
    Los Angeles, CA

    Default Re: Unusual jumping mechanism, Elgin(?) (By: 4thdimension)

    This is almost certainly an Elgin product. I think that all of the watch companies produced specialty items for the military during WW2. Here is another Elgin product - a platform escapement. It measures 0-size and appears to use a 16-size escapement. The number on the back - 31322 - is close enough to the 31595 on Aaron's piece that I wonder if this isn't a part number or contract number rather than a serial number.
    Click image for larger version. 

Name:	31322platform.jpg 
Views:	23 
Size:	293.0 KB 
ID:	337223
    Jerry Treiman, NAWCC member since 1971
    Charter member of Pocket Horology Chapter 174

  5. #5

    Default Re: Unusual jumping mechanism, Elgin(?) (By: Jerry Treiman)

    That makes more sense as a contract # or something "military" than a serial #. As a straight SN, it would be way too early

    I would also agree with the comments that it might be some sort of prototype or sample, I don't have a good picture of it but the side of the non-balance cock is plated, but otherwise unfinished, there are still saw or casting marks on it


Similar Threads

  1. Unusual electro mechanical wall clock.
    By Troy Livingston in forum Electric Horology
    Replies: 8
    Last Post: 07-29-2013, 06:59 PM
  2. American Pocket Watch Help w/ Winding Mechanism Elgin 12S Grade 303
    By sderek in forum Watch Repair
    Replies: 4
    Last Post: 02-13-2012, 11:28 AM
  3. unusual fusee mechanism
    By raymond c matthews in forum Clocks General.
    Replies: 3
    Last Post: 06-09-2005, 01:46 PM
  4. Unusual Strike Mechanism: What's it called?
    By bangster in forum Clocks General.
    Replies: 4
    Last Post: 06-03-2005, 04:20 PM
  5. Information on an unusual Elgin pocket watch
    By Dave Chaplain in forum American Pocket Watches
    Replies: 0
    Last Post: 12-13-2003, 01:37 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts