Old 'Gun & Accessory' catalogs are kind of frustrating because they are seldom dated.

Catalog 'numbers' are not too helpful, because it is not easy to determine the frequency at which they were issued.

The content sometimes gives a rough clue: Some sources indicate the Model 52 Winchester got its "speed lock" in 1930.

It is likely Pacific catalog, #7, 'with the latest model' of the 52 Winchester (with speed lock), came out in 1930.

(Catalog #7 uses inventor/machinist - Walter J. Sutton's home address and not the eventual Pacific Company address at 355 Hayes St.).

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