I think some of the neatest watches that Hamilton ever put out where the 18's movements marked with "Motor Barrel" (I have a couple of 940's and a 936 with that marking). I am thinking about starting a collection of Hamiltons with those markings. Can anyone advise me of the other grades with that type of mark.

Thanks for any info

If you are only interested in 18 size, then 936 (after 1909 sn 634001?)), 940 (after 1908,sn 620001), 941 (starting in 1909 sn 623001), 942 (1907-8), 944, 946, and 947.

I am not positive on all of these starting dates.

Don

Don, thanks for the information. Gives me a starting point.