The Wurlitzer Selector Latch Pin Spring # 57110 is used on the Electric Selector found on the mechanism in models
1700, 1800, 1900, 2000, 2104, 2204, 2304, 2310, 2404, 2410, 2504, 2510, 2610, 2710, 2810, 2910, 3010, 3110, 3210 and 3310.
In other words, it is used on the model 2000 plus all 100 and 104 selection models.

This listing is for a group of ten springs, even though only five are shown in the photo.