I recently picked up a 50* SM6 with the stamped “serial number” perpendicular (not up and down) the hosel. I’ve been told this is a sign it is from one of the tour vans. My first question is: is that true? My second question is: is there a way of telling which van it came from, which maker put it together, or for whom it was made?

FWIW, the stamp looks to me like “1911” or something. Definitely a “19..” Not sure what those last two characters are. Also, the ferrule is completely different than anything I have seen on a retail Vokey...or any Titleist for that matter.

Any info is greatly appreciated!

Thanks in advance TT!