Rolex Spare Parts Provisional Catalogue 1948
Deniss Fedotovs, 30.10.2025., 17:41Catalogue published in March 1948 consists of 16 pages, listing following Rolex calibers: 170, 100, 150, 160, 161, 180, 250, 200, 210, 300, 310, 350, 360, 400, 420, 500, 510, 520, 530, 600, 620, 630, 700, 710, 720, 730, 740, 800, 850.
In the introduction it's explained that this is Provisional catalogue, before publishing "General catalogue of Rolex watch materials" in the course of the same year.

Typical page looks like this:

Information about all watch calibers represented in this catalogue can be already be found in The Watchmakers App, which has the most comprehensive Rolex movements list to this day.
The Watchmakers App