I had a F grade 1100 once. But I was told by a Remington rep that it was not called a F grade when it was made. It predated the real F grades. Maybe a prototype or one of several versions made before they settled on one version. The later F grades did have almost the same engraving, perhaps even a bit nicer to be honest. Someone else liked it more than I did so down the road it went. There were a number of custom shop gun from Remington that never made it into a catalog or the regular lineup. The best were guns with "employee" wood on them. Had a feind who retired from Remington and he went and selected out his wood for every gun he had. Went right into the wood room and turned over ever blank to find his "employee grade wood". I never knew what he did at Remington but he had pull and his wood showed it.