145022 74 with early movement

Nice find! These 74s do constitute an interesting little glitch in the relationship between production date and serial number. While yours is very early, 31x is generally recognised as the beginning of the range for -74s. Indeed I also have one that appears entirely correct and is in the same range. When I was collecting data for the development of the prediction methods a couple of years ago, I found 13 extracts in the 31x range. All but one gave production dates of 1971. The exception was one in 1972. Even though 31x is recognised as the beginning of the range for the -74 I have personally never seen an extract showing 31x and a 1974/75 production date. In fact, I have a pet hypothesis that no such extracts exist. Not because there's anything wrong with these watches, but because of the relatively chaotic nature of the mechanical watch market in the early 70s and/or because of idiosyncratic record keeping methods. I've spoken to others on the board about this and while there's agreement that these watches can be correct, there are different ideas about how they came about. You will almost certainly also get some comments saying this is too early and the movement must be a transplant. In my reckoning, there are too many of these out there for us to write them off in that way. More and more will appear in the fullness of time as interest in the 70s speedies grows.

Interesting stuff! Do report back when you get your extract.

By the way, there's a typo in the thread title: it should be 145022 rather than 145002

Because threads need pictures, here's my 145022-74 which is also in the early 31x range