Used Force Fins - Model? Size?

[gstucke]

Some of the older Force Fins did not have a size embossed on them? How can the size be determined? Are there foot pocket measurements for each size???
Also, I am told that the earlier Pros were not marked as such. Is this true? If it is, how can you tell if an older pair are Pros or Originals???
Thanks.

 

[Bob Evans]

gstuke, Sizing, on models made before 1985, will appear on the bottom of fin near the leading edge of fin blade. Will look like XL Pat Pend, or L Pat Pending, or ML pat pend. Their will be a small Force Fin Logo on top of foot pocket. After 1985 sizing went in-side the foot pocket below where your heel goes. If your blade feels flexible then it is a Original, stiff it's a pro. My guess is it is a Original. So much water has passed under the bridge, but I think for a very short period in 1984 we might have let a few escape without sizing and logo. If you have this pair then you have some thing very special, hang it on the wall and get yourself a newer pair. Best, Bob