Hey Jeff - Excuse me, Mr. Lucky:
Somebody up there likes you. I got your address too late to ship yesterday. While I was putting the 60's tuners away, I found I have one that has an 'S' on the back, and it is a treble-side one (As in G and D strings). Thinking back, this is not that uncommon of an occurance. I have seen it before.
Upon closer examination of the tuners, we have another question that needs to be answered, as there is a difference between the two sets. One set is circa 65 and the other is 70. One has rounded (dome shaped heads) on the screws holding the 'ears' on and the other set has flat ones. I could assume since your bass is a 74(?) that you would need the flat head (barrel shaped head) screw one, but let's just check to make sure you get one that matches.
Well, when you get this, all you will have to do is send it off to be striped and gold plated, and you will have a real set. Might be a good idea to send it to the plater Alembic uses, as they are experienced doing guitar parts all the time. Just let me know the head type of screws on your other tuners, and you should be in business sooner or later.