1944 Rolex Oyster Perpetual 6509 - bracelet clasp not stamped

[madraida]

My MIL asked me to remove the band/bracelet of her Rolex Oyster Perpetual 6509 so she can take the bracelet to her goldsmith for welding. The clasp has cracked where the pin is inserted.

The serial no. on the watch is 290XXX which, according to a stickied thread in the Rolex Reference Library, was manufactured in 1944. It was passed on to my MIL by her mother. Both women used the watch as an everyday watch so the bracelet looks stretched and there are previous welding spots on the clasp.

My question is, are all Rolex bracelet clasps supposed to be stamped with any/some of the markings we've come to expect - Rolex, woman's head, code, curly figure, etc.?

I ask because my MIL's Rolex clasp doesn't have any marking which makes me wonder if (1) Rolex didn't stamp their clasps in 1944, (2) it's a fake, or (3) the goldsmith who "fixed" her bracelet before did a switcheroo.