Looking good so far. Love the "tribute" cars as they hold all the memories!
In real life the roof numbers were initially the "shop" number of the car and had nothing to do with beat or call sign. 1A12 is a Central Division, 2 man car, patrolling beat 12. Later, the division number was added to the trunk, so a 1 would be on Central Division cars. Air units had to ID particular cars by calling "Shop xxx" and then giving directions. Pilots caught on quicker that the beat coppers. No one really remembers the car's shop number, only the call sign.