Rear end stamping

[bertfam]

Or.... After thinking about it for awhile, another possibility is that the 69 listing is correct, but you have a 68 rear end. What's the date code on the front of the pumpkin? Your stamping is December 11th so the pumpkin should be the same or a litte before that. It will also list the year. The format will be something like:

L108

for December 10th, 1968 (for the 1969 model year).

Also, after looking closer at your first picture, what appears to be an "F" might actually be an "E", just with the lower "leg" stamped very lightly. Kind of hard to tell though.

Ed