Front turn signal irregularity

[SBCA96]

OK, so I have had my Avanti for over 12 years, and the other night

my friend looks at it and says, "one of your turn signals is bigger".

Sure enough, one of my turn signals IS bigger! The drivers side

turn signal is larger then the passenger side.

Drivers is 6 3/8 inches tall

Passenger is 5 5/8 inches tall

Drivers has on the lense "64 STU-1" top and "SAE DP 64 (S)" bottom

Passengers has "63 RQ DP" top and "SAE DP 62" bottom

What gives?? I am assuming that in 64 they increased the side of

the turn signals? I knew that the fender had been damaged and it

was repaired, but I guess they used a 64 fender! Good thing they

didnt decide to use one square headlight and one round also!!

Tom