If you mean this stamp on the clamp
it's not a serial number but the RAF reference number for the flashes (so it is the same on all of them)
There was an actual serial number on the camera though.
Not sure if all of them came with flashes but it is likely it was a standardized kit.
Also keep in mind that the flashes were not uniquely made only for RAF (except the clamp bar stamp) they were making and selling the same flashes at the same time for anyone to buy.
There was an actual serial number on the camera though.
Not sure if all of them came with flashes but it is likely it was a standardized kit.
Also keep in mind that the flashes were not uniquely made only for RAF (except the clamp bar stamp) they were making and selling the same flashes at the same time for anyone to buy.