With all the Trifecta discussion, there are also the:
1. The Narrow Rib Trifecta, including the large knob subset.
2. The Wide Rib 5-screw Trifecta
3. The 4-Screw Model Numbered Trifecta
4. etc...
This is a fun area of collecting. And to all those who have amassed any of the Masterpiece Trifectas, A HUGE
CONGRATULATIONS!