I finally got around to reading this entire thread and found it very entertaining and interesting...and informative. Here are some serial numbers from 4 bows on my rack:
1959, 60", 47#, BG611 (copper coin and purple heart window)
1959, 64", 55#, DB732 (copper coin and purple heart window)
1960, 60", 49#, 18ZX4? (aluminum coin, rosewood window)
1960, 64", 41#, DD327 (copper coin, rosewood window)