Windshield numbers?

[SFcarbuff]

I was preparing my original winshield to reinstall and notice the numbers 15-12 in the passenger side lower corner.   My son also is re-doing his original winshield in his c code fastback.  He also has similar numbers.  Both cars are end of March , San Jose built cars.   Just curious if anyone knows the meaning of these numbers?  Thanks

[CharlesTurner]

Seen the same on SJ cars and also other assembly plant cars.  Probably a rotation number or something to ID that a particular type of windshield went in a car optioned for that specific type.

[SFcarbuff]

Thanks, Makes since, my car has a plain window and the c code has tint.  Different numbers.

[papa scoops]

going to look thru my notes, bought clear w/s from classic industries, has all requested info including date, mfg, type of glass, side printed on, dot, all as coppied from my original feb 66 built 1122. all is perfect! (except glass thickness) that we know there is no blanks out there. i think clear was only availible for 66, very pleased, got mine in less than 2 days, very good price, plus the box makes nice work bench! talk to jeff

[Bob Gaines]

going to look thru my notes, bought clear w/s from classic industries, has all requested info including date, mfg, type of glass, side printed on, dot, all as coppied from my original feb 66 built 1122. all is perfect! (except glass thickness) that we know there is no blanks out there. i think clear was only availible for 66, very pleased, got mine in less than 2 days, very good price, plus the box makes nice work bench! talk to jeff

Clear glass Front and side was used on 65/66 and all 67-70 without A/C.