Frame number : M13CAC009
The M is the factory. M is Marvel, F is Fairly and T is Ti sports
1 is the model number.
1 Team Issue
2 Team Marin
3 Pine Mountain
4 Eldridge grade
5 Bear Valley
6 Muirwoods
7 Palisades Trail
8 Bobcat Trail
4 is the year ending number. That would be 1993.
CA is month and date code, not really relevant!
C is the size centre to centre.
A is 14 inches
B is 15.5 inches
C is 17 inches ( this makes it 19 centre to top)
D is 19 inches
E is 20 inches
009 are production numbers that are factory use only