can anybody tell me what this means

[Lance]

Your 1956 "Factory Thorough Repair" is very nice, added to the fact that it is a harder to find conversion of a 1942 Savage Mk I. All matching examples are around but do command a bit of a premium over those with a mis-matched mag. Conversions at Fazakerly ended in 1958. You could always sell it to me and not worry about describing what FTR is......