How do I Identify the model of an Al Merrick CI board?

[jasonhdorsett]

I have an old Fiberglass shortboard shaped and designed by Al Merrick that was given to me. It's in decent shape, but too small for me. I wanted to trade it in for something suitable for a beginner, but I have no idea what it is worth. How can I identify the year and model of the board? Here are some pics

[crepuscular]

think it's a MSF, not 100%...