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Davew833 · 13 December 2010, 02:50 PM

Another question about my "new" red sub. Trying to understand "hacking" here. Serial number is 2929XXX which I placed in 1969 or early '70. It's a 1575 movement, but it appears to have "hacking" in which the second hand stops when you pull the stem out to set it. Is this correct for a 1969 1680?

jedly1 · 13 December 2010, 03:37 PM

2.9 IS actually 70/71 and i'd go 71..... and contrary to popluar texts the hack was introudced on the 1680 at the back end of 70 and certainly all 71 (ok except maybe the odd throwback) had the hack..so no worries at all on yours.

BTW whats the datecode inside the caseback ?

Racer X · 13 December 2010, 03:37 PM

A 2.9 mill serial number is most likely 1970. I don't know if a 1970 1680 should be a hacking movement or not, but my 1969 1680 is non-hacking.

Andad · 13 December 2010, 03:41 PM

A hacking 1575 is not unusual. I would put your watch closer to early 1972.

My DJ is a non hacking 1570 stamped Nov '71 "276****".

glocati · 13 December 2010, 03:45 PM

Quote:

Originally Posted by jedly1

2.9 IS actually 70/71 and i'd go 71..... and contrary to popluar texts the hack was introudced on the 1680 at the back end of 70 and certainly all 71 (ok except maybe the odd throwback) had the hack..so no worries at all on yours.

BTW whats the datecode inside the caseback ?

Great to know. As you note, several sites/sources like to throw the 1972 year as introduction of the hacking feature and i always thought that it was a bit earlier than that.

Davew833 · 13 December 2010, 03:47 PM

The watchmaker that opened the case for me and inspected the movement didn't tell me the date code-- being a newbie I didn't know to ask. Next time I go in I'll be sure to ask. (I don't have a caseback opening tool yet.) Thanks again for the quick answers- I'm learning a LOT here!

mid-o-light · 13 December 2010, 04:30 PM

My 3.1M III.71 1680 is hacking movement FYI.

Davew833 · 17 December 2010, 03:49 AM

Watchmaker #2 said the date code in the caseback was III/70, so if hacking was introduced in late '70 it looks like it may correspond.

ABChop · 19 December 2010, 05:05 AM

Mine is non-hacking
III 69

lupus · 19 December 2010, 08:15 AM

2.6/ iv-69/ non hack

13 December 2010, 02:50 PM	#1
Davew833 "TRF" Member Join Date: Dec 2010 Real Name: Dave Wilkinson Location: Utah Watch: 1970 Red 1680 Sub Posts: 50	1680 Hacking or Non-Hacking? Another question about my "new" red sub. Trying to understand "hacking" here. Serial number is 2929XXX which I placed in 1969 or early '70. It's a 1575 movement, but it appears to have "hacking" in which the second hand stops when you pull the stem out to set it. Is this correct for a 1969 1680?

13 December 2010, 03:41 PM	#4
Andad 2024 SubLV41 Pledge Member Join Date: Nov 2006 Real Name: Eddie Location: Australia Watch: A few. Posts: 37,526	A hacking 1575 is not unusual. I would put your watch closer to early 1972. My DJ is a non hacking 1570 stamped Nov '71 "276****". __________________ E

19 December 2010, 05:05 AM	#9
ABChop "TRF" Member Join Date: Dec 2008 Location: Canada Posts: 671	Mine is non-hacking III 69 __________________ - "M" 16600 Sea-Dweller - "A" GMT 16700. -“A” 16613LB Sub - 1680 Red Sub, Mark II, "Full Set" - 116660 DSSD D-Blue, 124060, 126613LN, 116710BLNR - 116500LN White Dial - “U” 16610 “SWISS” dial

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13 December 2010, 03:37 PM	#2
jedly1 "TRF" Member Join Date: Feb 2010 Location: mel(oz)/Yorks(uk) Posts: 1,929	2.9 IS actually 70/71 and i'd go 71..... and contrary to popluar texts the hack was introudced on the 1680 at the back end of 70 and certainly all 71 (ok except maybe the odd throwback) had the hack..so no worries at all on yours. BTW whats the datecode inside the caseback ?

13 December 2010, 03:37 PM	#3
Racer X "TRF" Member Join Date: Jul 2010 Real Name: Dave Location: Unknown Posts: 999	A 2.9 mill serial number is most likely 1970. I don't know if a 1970 1680 should be a hacking movement or not, but my 1969 1680 is non-hacking.

13 December 2010, 03:47 PM	#6
Davew833 "TRF" Member Join Date: Dec 2010 Real Name: Dave Wilkinson Location: Utah Watch: 1970 Red 1680 Sub Posts: 50	The watchmaker that opened the case for me and inspected the movement didn't tell me the date code-- being a newbie I didn't know to ask. Next time I go in I'll be sure to ask. (I don't have a caseback opening tool yet.) Thanks again for the quick answers- I'm learning a LOT here!

13 December 2010, 04:30 PM	#7
mid-o-light "TRF" Member Join Date: Aug 2010 Location: Thailand Posts: 32	My 3.1M III.71 1680 is hacking movement FYI.

17 December 2010, 03:49 AM	#8
Davew833 "TRF" Member Join Date: Dec 2010 Real Name: Dave Wilkinson Location: Utah Watch: 1970 Red 1680 Sub Posts: 50	Watchmaker #2 said the date code in the caseback was III/70, so if hacking was introduced in late '70 it looks like it may correspond.

19 December 2010, 08:15 AM	#10
lupus "TRF" Member Join Date: Feb 2010 Location: Netherlands Posts: 86	2.6/ iv-69/ non hack

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