1520 vs. 1530

[finance21]

While I know the 1530 carried a COSC certification in the 5512 I am looking for a bit more of information regarding these two movements. What are the differences, how tough are they, are they still tough to this day?

Are any of you aficionados out there able to point me in the direction of a good discussion or perhaps an article on this topic?

I know, “tough” is a bit of a subjective word maybe reliable would be best suited for this topic.

[Subfiend]

Some 5512s also had the 1520. The difference between COSC cert and no cert was whether the watch was tested. If so, it was a 5512. If not, it was a 5513.

[leopardprey]

Subfiend, good to see you back. Been busy? So what is your next Rolex adventure? Have a chance to try out the Randall Dive Knife yet?

[padi56]

Originally Posted by finance21

While I know the 1530 carried a COSC certification in the 5512 I am looking for a bit more of information regarding these two movements. What are the differences, how tough are they, are they still tough to this day?

Are any of you aficionados out there able to point me in the direction of a good discussion or perhaps an article on this topic?

I know, “tough” is a bit of a subjective word maybe reliable would be best suited for this topic.

Basically the only difference is the APH 18000 Cal 1520 and 19800 APH in the Cal 1530.And IMHO the 15XX series movements the finest Rolex has ever built,well over engineered and bulletproof and very accurate.

[Lol-x]

Originally Posted by padi56

Basically the only difference is the APH 18000 Cal 1520 and 19800 APH in the Cal 1530.And IMHO the 15XX series movements the finest Rolex has ever built,well over engineered and bulletproof and very accurate.

Thanks for that explanation Peter. I was just wondering what mechanically gives rise to the difference in amplitude in the 1520 to the 1530 movement (i.e. are the gears more finely cut?).
So the 1530 is also different from the 1570 too I guess because I understood the APH of the 1570 movement to be 21,600?

[padi56]

Originally Posted by Lol-x

Thanks for that explanation Peter. I was just wondering what mechanically gives rise to the difference in amplitude in the 1520 to the 1530 movement (i.e. are the gears more finely cut?).
So the 1530 is also different from the 1570 too I guess because I understood the APH of the 1570 movement to be 21,600?

Well Steve the 1570 is a 19800 APH movement,very late 60s early 70s most manufactures switched to the high beat APH 28800 including Rolex.As soon as one started my watch is bigger, higher than yours,most followed suit a bit like the once watch jewel wars.Now several manufactures had 36000 APH movements Zenith El Primo for one,but ETA had a high beat 36000 APH version of the ETA 2824-2T than UN used in there marine chronometer.

[Alex Stylianou]

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