Search found 211 matches

by JackW
Sun Oct 01, 2017 1:24 pm
Forum: Parts for sale
Topic: FS - Hamilton 987a or 987s hairspring with stud and collet
Replies: 1
Views: 127

FS - Hamilton 987a or 987s hairspring with stud and collet

Recently received a box of watch parts. Making my way through them to figure out what I have. Have three hairsprings for the 987A or 987S. $15 each + $3 shipping for USA. Free shipping in the USA if you buy all three. If you are overseas, I can get you a quote. hrsprg_envelope.JPG hrsprg_allparts.JP...
by JackW
Wed Aug 30, 2017 8:46 pm
Forum: Waltham Watch Forum
Topic: a pair of Walthams
Replies: 1
Views: 138

a pair of Walthams

Last month (July 2017) I had a good month with watches. A few eBay purchases, estate/yard sale finds and even scored something good that the Colorado NAWCC regional. In these were two Waltham products: A vintage car clock and a Depollier Khaki wrist watch. I'm not interested in collecting clocks. No...
by JackW
Wed Aug 30, 2017 7:03 pm
Forum: General Discussion
Topic: Hurricane Harvey here in Houston
Replies: 16
Views: 563

Re: Hurricane Harvey here in Houston

Stan,

Glad you and your wife are doing well and are able to help out for those less fortunate.

Advise taken for making a donation; although I chose The Greater Houston Community Foundation.
by JackW
Thu Jul 20, 2017 8:27 am
Forum: Gruen Watch Forum
Topic: Case serial numbers found in The Gruen Watch Catalog reveal interesting data
Replies: 4
Views: 290

Re: Case serial numbers found in The Gruen Watch Catalog reveal interesting data

The number 4,000 has been tossed around as a "batch size" From Cleves' talk he stated 2000 for batches from Wadsworth. Keep in mind this was from his interview with employees of Wadsworth towards the end of Wadsworth as a going concern. Might be worthwhile to review the talk again or write Charles....
by JackW
Wed Jul 12, 2017 10:23 am
Forum: General Discussion
Topic: International Dial not answering phone or emails
Replies: 16
Views: 1574

Re: International Dial not answering phone or emails

I just used Kirk Rich in California. I've mixed feelings about the results on the work. It looks good, for the fonts and the printing but they left a small flaw in the minutes track where it intersects with the subseconds track. More expensive than ID. Robert told me that he was nearly out of a blac...
by JackW
Tue Jul 11, 2017 1:44 pm
Forum: Gruen Watch Forum
Topic: Caliber 440 movement serial number dating
Replies: 17
Views: 1039

Re: Caliber 440 movement serial number dating

I doubt that production was linear over the year. There were peak seasons like XMAS or graduation time just to name the two highest peaks. So I believe that in about April and October the production numbers should have been at least doubling or tripling the figures of let's say January production.T...
by JackW
Mon Jul 10, 2017 11:03 am
Forum: Gruen Watch Forum
Topic: Gruen Case Serial Number to Date Tool....
Replies: 3
Views: 272

Re: Gruen Case Serial Number to Date Tool....

Mike, I'm please that you think the Wadsworth Serial numbers were an important component to understanding Gruen watches better. You were a big part of that effort. Jack, did you keep track of the HIGHEST numbers you saw within each year? How often did the serial number nearly roll over or did it eve...
by JackW
Sat Jul 08, 2017 10:04 am
Forum: Gruen Watch Forum
Topic: Gruen Longacre Quadron 14K
Replies: 3
Views: 275

Re: Gruen Longacre Quadron 14K

Beautiful!
by JackW
Thu Jul 06, 2017 1:26 pm
Forum: Gruen Watch Forum
Topic: Caliber 440 movement serial number dating
Replies: 17
Views: 1039

Re: Caliber 440 movement serial number dating

Hi Mike, What I'd be curious to see in your graph is the R^2 value for your data and an error or standard deviation calculation. You said you got your data from one single reliable source. However, I wanted to see if you are on to something here. I took data that I had from several years ago but als...