Rolex Forums - Rolex Forum - View Single Post - The GMT 1675 movement, is it a 1570 or 1575

rdparri56 · 12 October 2009, 11:16 AM

Further note: I've got a serial number designating my 1675 model number watch to be a 1970 year model (case number 297xxxx, if someone could double check me), but my watch has the hacking feature, which if I understand correctly means that when the crown is pulled all the way out, the second hand stops, which it does. According to the website: http://www.gmtmasterhistory.com/gmt-..._ref_1675.html the hacking feature was introduced in 1971. So I’d be interested to know: Are there other watches out there with the hacking feature showing up back in 1970? One more question, we have mfg dates for case numbers, any way to correlated a year of mfg date to the internals of a Rolex?
Thanks!

12 October 2009, 11:16 AM	#17
rdparri56 "TRF" Member Join Date: Sep 2009 Location: Dhaka Bangladesh Posts: 3	Hacking Feature on 1970 GMT Further note: I've got a serial number designating my 1675 model number watch to be a 1970 year model (case number 297xxxx, if someone could double check me), but my watch has the hacking feature, which if I understand correctly means that when the crown is pulled all the way out, the second hand stops, which it does. According to the website: http://www.gmtmasterhistory.com/gmt-..._ref_1675.html the hacking feature was introduced in 1971. So I’d be interested to know: Are there other watches out there with the hacking feature showing up back in 1970? One more question, we have mfg dates for case numbers, any way to correlated a year of mfg date to the internals of a Rolex? Thanks!