Bulova Timer / Sportstimer / Stopwatch
Not sure of the year this was made. The movement shows a '57' stamp, but that may or may not have any relevance to the mfr year. Appears to be a stainless case, has a fair amount of weight, but no stamp or markings to show case material. Movement is a 21 jewel Swiss 19AE. Back of case is stamped 1351.
1960 ad shows this as the Bulova Timer; same post shows a 1969 ad where the lanyard ring is located at the bottom vs. the top in 1960.
One other stopwatch in the database labeled Sportstimer
Based on a Valjoux by the makers mark, and the '57' will be the calibre.
No evidence of pre-1960 for the Bulova stopwatches, so would date it to this as the earliest.
Edit- actually, fifth's example has a single-button stopwatch 'war bonds' advert in the thread, so could be earlier. Mea Culpa!
Here is a 1962 photo, showing both types, top/bottom ringed.
In reply to Based on a Valjoux by the by bobbee
In reply to April 1967 ad from the Cedar by William Smith
So what does 200 in 2 1/2 years mean - that Bulova made limited runs of 200 every 2.5 years or were there only 200 ever made sometime around 1959 or earlier and still around several years later (ads form '67 and '69) being sold? Limited runs of 200 every few years seems likely to me.
In reply to So what does 200 in 2 1/2 by Andersok