August 2019: Christine's Antiques has closed, the awning is gone, so I am disclosing the final coordinates. The sign is still there, so be sure and swing to see it.
To obtain final coordinates :
N 32 14.ABC
W 110 50.DEF
There is a billboard on top of the east end of the building at the GZ. On the very bottom of the billboard there are seven black and white digits.
ABC= (Last four digits of this billboard number) minus 3793.
At the GZ there is a blue and white awning with a number on it.
DEF= 5325 minus (the number on the awning. )
You can check your answers for this puzzle on GeoChecker.com.
Christine's is the oldest antique shop in Tucson, and right next door is the Elegant Junque Shop, the second oldest antique shop in Tucson. They have been n business for 52 years, so the neon sign is likely that old, and it is still lit up at night for our viewing pleasure!
January 2019 note: I see that Christne's may finally be retiring. Let's hope they follow the city's neon sign ordinance ad retain the sign where it is.
FTF: tugies!