Don't forget G-Man, L39 was then on 233d St in Woodlawn. L39 was 3d due, or more recently the FAST truck, to boxes along (and south of) Gun Hill Rd until they relocated to E63 just a few years ago. In fact, there were boxes above Gun HIll Rd along Jerome and Bainbridge Aves, that L39 was 2d due and L46 4th due. i.e.
3591 (Jerome at 212 ST) or 3590 (Binbridge at 212 St), both assignments:
62 79 63 81 32 39 37FAST 46
With L46 now a TL it is unlikely they would relocate to L39 on these boxes now.