Hi Mick. Hohner SL models came up since end of the eighties, so either if its 01MC777 or 91MC777, both would mean that this guitar was made in 1991.
Regards
Kristin
Hi Mick. Hohner SL models came up since end of the eighties, so either if its 01MC777 or 91MC777, both would mean that this guitar was made in 1991.
Regards
Kristin