366/12 Convertible Cavity Identification

[musicimpossible]

I have been looking at a number of vintage 366/12 convertibles and of the 3 I have seen in the last few months, all of them have 360/12 written in the control cavity and NOT 366/12.
This seems reasonable as any 366/12 would have originally began as a 360/12 and somewhere along the line it was decided to modify it to a convertible. Hoping to have this confirmed by any 60's 366/12 owners. If you have one could you check for me?

[scotty]

Mine says 360/12 Z i wouldn't look to deep into what it is scrawled into the cavity.
Here is another reason not to get to hung up on what is written in the bodies of guitars. This is from a 59 360F.

[knavel]

Same all over the place musings in my 67 336-12. First "345" is written in thick black marker. Then "366" (not 336) is written in pencil.

[collin]

Just search the board. Numbers in a soundhole have zero meaning whatsoever to the final guitar.