Understanding 1575 Calendar Retaining Rings

[Ronin]

All,

I was just PM'ing a member giving them a helping hand, and thought I would share this tidbit of knowledge in public as well.

This has been discussed before, but I figure the pictures will help.

The discussion is about What 1575 Rolex movement to transplant into a Yuki, Phong, even MBW with the LEAST amount of issues.

The short answer is you want a donor movement from a 150x Date or 1680, 1665, 551x to make life 'easiest'. (Beware eBay auctions with 1575 movements advertized as 1680/1675/551x as some are actually pulled from 160x DateJust's. Use the photos below for confirmation).

You CAN use 1575 out of a 160x Pie-Pan dialed DateJust, but you will want to swap the calendar retaining ring or GRIND it down.

Allow the pictures to explain.

Upper Left Rolex Package IS THE correct part. PN: 7956

This is the 1601 DateJust setup. Note the sloped shoulders.

Part 7956

Left is from 1601 Pie-Pan type dial, right is right!

See the Pie-Pan retaining ring is a larger diameter. You can grind it down 1mm as needed.

This is ready to slide flawlessly into my old Yuki.

To recap, there are 3 different Calendar retaining outer rings.

1.) For Pie-Pan dials found in 160x series Date Just (these have the sloping outside) (you don't want this, unless you do what I did. I swapped the part, or you can GRIND down outside shoulder.)

2.) 1675 GMT's had a flat version as well, but slightly different diameter. Ignore this since you probably won't find one of these.

3.) The one you want is the same across 150x, 1680, 1665, 551x. So a 1501 Date is the same as a 1680 if you are going for 1:1.

Hope this helps.

[Ephry73]

Thank you Ronin!!!!!

[alligoat]

One little correction, it's a 1500 Date which is different from a 1600 Datejust.

[ubiquitous]

Slight bevel similar to a pie pan.

Smaller diameter like a Date 1500.

Jewel count on the ring.

[coolfire]

And how difficult is it to obtain those 7956 retaining rings?

[Ronin]

And how difficult is it to obtain those 7956 retaining rings?

They show up from time to time on eBay...

..corected 150x Date (Thanks Alligoat)

@Ubi, what is your movement pictured out of?

[coolfire]

They show up from time to time on eBay...

..corected 150x Date (Thanks Alligoat)

@Ubi, what is your movement pictured out of?

Thanks dude!

Oh, that 1570 came outta his "Ubimariner". Hehehe.....

[danielv2000]

Is there an aftermarket equivalent?

Thanks

[danielv2000]

Dumb question.

Al these 1500 Dates on eBay, how do I make sure the right movement and calendar ring is in there. Could someone have swapped it out?

[pam007]

Awesome post.
Thanks again.

Very Informative !!

[automatico]

"To recap, there are 3 different Calendar retaining outer rings."

"1.) For Pie-Pan dials found in 160x series Date Just (these have the sloping outside) (you don't want this, unless you do what I did. I swapped the part, or you can GRIND down outside shoulder.)"

"2.) 1675 GMT's had a flat version as well, but slightly different diameter. Ignore this since you probably won't find one of these."

 

The calendar ring for a 1675 GMT/1655 Ex II with 1575GMT movement is a little bit thicker too. The p/n is 7965...it is very hard to find, I have been looking for 2 years.

 

"3.) The one you want is the same across 150x, 1680, 1665, 551x. So a 1501 Date is the same as a 1680 if you are going for 1:1."

 

 

"Al these 1500 Dates on eBay, how do I make sure the right movement and calendar ring is in there. Could someone have swapped it out?"

 

Generally a 1500 will have the right parts but you might find anything on eBay. I bought a no date 1570 last year that turned out to be a 1560 with a 1570 autowind assembly. I did not see the 'curb feeler' over the balance spring.