I have had this Hamilton 946 with a Montgomery dial for about 5 years and ever since then I have never seen another one with the 'Double Roller' engraved in this position on the movement. I just wondered if it was unusual.

Peter, I don't know how unusual that position is for "double roller" but I did find a photo of another one, sn 459360, marked the same way. If I read your sn correctly it is 459380. If so during the period when they were finished (1912) that was the way they got marked. Don't know how many were done that way.

Bob

I tried to clarify the image to improve the many markings Hamilton so proudly made on the Barrel cover. About this time the "new" RR Time act rules added that all features were clearly engraved on the movement, including model number, # of Jewels and # of Adjustments. Hamilton chose to add their own other features such as Motor Barrel (very complicated on this model) and the Double Roller (good idea).

I think Robert's 1912 movement would be considered "fully marked," which is more sought-after than earlier versions with fewer markings.

Bob; That photo that you mention with the serial number 549360 is indeed mine. I made an enquiry on another site about 3 years ago. At that time I was told that there were five known barrel plate versions. Evidently this is the 4th version and the first to be signed 'Double Roller' but this position was switched on the 5th version, and I've only seen 5th versions since I was given this information three years ago. Hopefully someone may know the start and end of the 4th version?

549360 Hopefully this is a clearer image.

Yes, nice photo; a dmk beaut.

Peter,

Thanks for sharing!!!

Here is a Private Label 946 from the 523k serial # range. This movement was made roughly 26k prior to your marked double roller above the jeweled mainspring barrel. What is interested about the PL is the 946 is below the jeweled barrel.

I guess someone at Hamilton enjoyed juggling the data around the mainspring barrel plate.