Hacking feature? When?

[crgrbrts]

When did Rolex introduce its hacking feature? My 1964 1002 doesn't seem to have it (or it doesn't work). On the other hand, you can sort of hack my 1959 1002 by pulling out the stem to "setting" position and applying a bit of anticlockwise pressure. The second hand will then stop and jump backwards a few seconds. It's crude, but it works -- kinda.

Thanks,

Craig
Washington, DC

[traf]

Interested as well, my premoon speedy cal321 works much like your '59


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[Brianmac 883]

As I understand it, the hacking feature was added to the 1570/1575 movement around 1972. I have an OP Date from 1977 and it hacks.

[jedly1]

There's a bit of variation in it across models but 70 -72 covers the period .

[michael067]

That sounds right, I have a 72 GMT Master and it has it.

[R.W.T.]

Depends on the watch. Some movements very early. Some not so early.

It wasn't an across the board switch on a certain day in all models at the same time.

You won't see a regular non date Rolex with hacking until you get into the 1570 movement for sure and even then it varies. Seems some 1520's happened a little earlier. But on the 1570 it will vary as I said depending on the model. The date just seems to hack before the "date" etc.

As for the effect of slightly reversing the hands to stop the movement, this is sometimes referred to as "watchmaker's hack". It is a function of the cannon pinion being properly tightened and adherent to the center wheel. The canon pinion clutches on the center wheel to allow you to adjust the hands in time setting. If it didn't you would strip the train. If the cannon pinion is loose it slips very easily but it still has enough friction to hold during the run of the watch to move the dial train. If it is TOO loose the watch will run fine but the hands go slow. If it is just right you can easily stop the watch in set position as described and then let go when the time is aligned with the known source.

[jedly1]

Yeah , Tommy's right if you go to non date 1520 you can comfortably be in 68 , there's a fair few 1016 with 67 backs that have hacking movements , but personally I still think that is more to do with a big batch of backs being made.

[R.W.T.]

I had an M first 5513 from IV 67 with a hacking 1520 I'm almost certain.

[axelbrass]

According to this Beckertime article, the 1570 movement though introduced ~1967 gained hacking years later in 1972.

[interestedwatcher]

Originally Posted by axelbrass

According to this Beckertime article, the 1570 movement though introduced ~1967 gained hacking years later in 1972.

I have two 1570s, one hacking, one not.

[interestedwatcher]

Originally Posted by crgrbrts

When did Rolex introduce its hacking feature? My 1964 1002 doesn't seem to have it (or it doesn't work). On the other hand, you can sort of hack my 1959 1002 by pulling out the stem to "setting" position and applying a bit of anticlockwise pressure. The second hand will then stop and jump backwards a few seconds. It's crude, but it works -- kinda.

Thanks,

Craig
Washington, DC

Also apparently moving hte movement backwards can cause serious damage.

[Claven2]

I wonder... can a pre-hack movement be upgraded to hack without a ton of work? Say a 1570?

[Dan S]

Originally Posted by R.W.T.

Depends on the watch. Some movements very early. Some not so early.

It wasn't an across the board switch on a certain day in all models at the same time.

You won't see a regular non date Rolex with hacking until you get into the 1570 movement for sure and even then it varies. Seems some 1520's happened a little earlier. But on the 1570 it will vary as I said depending on the model. The date just seems to hack before the "date" etc.

This is consistent with my personal experience, various times in the early 70s.

[athom]

between my (1967) 5513 and my (1978) 1675

[mbc]

I have a 1969 2.2 million serial 1016 that doesn't hack (with a properly stamped/numbered movement of six digits in the case)

I used to own a 1969 2.17 million serial 1016 with the hacking feature (and a properly stamped/numbered movement of six digits that comes after the one above).


Not surprising to me at all that Rolex would have put a 70/71 movement in a 69 case back then. Just so happens that my two 69 1016 were on either side of the change...

[GLADIATOR]

Rolex introduced hacking "around 1972"
-Source Rolex

[Pocosso]

My 1675, case-back II/71, Serial 295XXX. Has an hacking movement.

[TimeLord2]

Originally Posted by interestedwatcher

Also apparently moving hte movement backwards can cause serious damage.

I'm not sure about the 1002 movement he's talking about but from my understanding you can rotate the hands on a 1675 in either direction without damage to the movement.