A 36 1/2"  Karsten Mfg. Patent D207227 brass or copper Ping putter, marked Box 9990 Phoenix Arizona 85068.

In pretty good shape except the grip is shot and there is a little rust just above the hosel which I point out in a picture.

36 1/2"   I measured the length from the center of the sweet spot on the head to the end of the grip