I noticed that the CAI mark shows on at least one of the examples in Clawson's book.

He notes that the early production 1927s had grooved wood grips like the Ballister Molinas, but I don't know how long that lasted.

Remembering back when I picked through about 40 1927s, many had cheap cast commercial replacement parts installed here and there. Probably done by the importer, which wasn't CAI in this instance.