Delco Remy 1102380 10SI Marine Alternator 63 Amp 1-Wire Vintage Aftermarket Bezel so it might have been

so it might have been an automotive application

Sierra 18-21753

3L 262cid V6 GM Models 1986-1989

but nothing that should affect function

2L 502 MIE Inboard and Bravo applications 1996-1997  Also found on some inboard 350 MAG SKI & EFI applications 1991-1996

Delco Remy 1102380 10SI Marine Alternator 63 Amp 1-Wire Vintage Aftermarket Bezel so it might have beenPart Number(s) Included Manufacturer AC Delco Stamped Part Number 1102380 63A Rated Amperage 63 Amp Self Exciting Internal Regulator Negative Ground One Wire Connection 2 Inch Mounting Foot Equivalent Part Numbers Replaces Delco 1100576, 1100577, 1100894, 1100912, 1100914, 1100915, 1102393 and 1102496 Replaces Mercury Mercruiser 56045, 59755 and 69729 Replaces OMC 983424, 983836 and 988247 General Application Compatibility I believe this was an older