POG History
I did a bit of research on this and this is what little I know or believe so far .
1) Prince website says that the POG was first introduced in 1980. This is the one that had the 1 green stripe, and the words PRINCE & TOUR on the frame.
I do not know if this 1980 model had a bumper guard. I have seen POG without bumpers on the big auction site. I assume that the earliest version (i.e. 1980) would be the one without the bumper.
2) I have 2 of the POG OS 1987 model. This one has 4 stripes. On the side of the frame it says 'Graphite 110' . The word TOUR is NOT on the frame. It has 4 PRINCE's printed on the frame near the throat. The crossbeam stabilizer has GRAPHITE written on it. It has a bumper guard. The recommended String tension is 60-75 lbs. The current frames being sold have a lower recommended tension range.
3) I believe that the current production and sale of POG is based on the original 1980 model with the single Green Stripe and word TOUR on the frame. This is the same one sold on TW. These ones have bumper guards on them.
4) There are only 2 sizes made, the OS (107) and the mid (93)
5) The specs for the OS and mid have not changed much since 1980, and are as follows:
size: 107 for OS, 93 for mid
Stiffness: 63 for OS, 66 for mid
Composition: 100% Graphite
Cross Section: 19mm head/19mm shaft
Weight: 11.6oz/330oz unstrung, 12.2oz strung for both
Balance: 5 pt headlight for OS, 8 pt headlight for mid.
Power Level: 700 for OS, 600 for mid
String Pattern: 16x19 for OS, 14x18 for mid
Tension 57-67 for OS, 53-63 for mid
Tension range recommendation has changed from 60-75 for 1987 POG OS.
Feel free to add or correct any incorrect information above