5513 Cases - Are they all the same?

[one80]

Are all 5513 cases the same over the years, or did they change?
I thought I had read somewhere that PCG cases were slimmer than the regular crown guard cases.
Were there any other minor variations/changes over the years?

[shiftf7]

I have a 1963 PCG, a 1969, a 1976 and a 1987 apart from the crownguards on the PCG the cases and case backs are the same dimensions

[one80]

I found the info I’d seen re. The PCG thickness:

https://www.watchprosite.com/rolex/r...08713.5444098/

[SOG DIVER]

Interesting observations.
Skeet and Ural in " Vintage Rolex Sports Models" display interesting thin
cases for both the 5512 and 5513 references.

The 5512 and 5513 models were virtually interchangeable as to cases and many watch parts. Initially, the 5512s were supplied with the 1560 caliber
and it was COSC capable. Some 1530 engines are found in both the 5512 and 5513.
About 1963, at roughly the time the 5513 was introduced-the 5512 started to have the chronometer 4-line addition to the dial. But exceptions do exist.

Interestingly, 5512 references are found with 5513 stamped case back interiors.The reverse is also seen.
My 1960 PCG 5512 is stamped 5512, along with a gilt chapter ring dial. It does look remarkably thin. The size of the movement in height may have caused Rolex to slightly modify the cases a bit larger-later. A micrometer might be needed to confirm that.