So it seems there were three neck plates on Springys?
1. 1-13/16” x 2-1/2” no serial numbers
2. 2” x 2-1/2” narrow hole spacing with serial numbers
3. 2” x 2-1/2” wide hole spacing with serial numbers
1. 1-13/16” x 2-1/2” no serial numbers
2. 2” x 2-1/2” narrow hole spacing with serial numbers
3. 2” x 2-1/2” wide hole spacing with serial numbers