Amps
With the introduction of the Croc-Skin covered amplifiers in September 1963, Selmer commenced a totally new single serial # system for its electronic equipment. This appears to have commenced at 10001 and was used on all models. Numbers were therefore allocated for each amplifier in the order of manufacture, and the model name/number was no longer included with the serial #.
Numbers were printed on the Selmer makers-name label which was adhered to the back panel of the amplifier cabinets, or in some (but by no means all) speaker cabinets.

Serial # 12986 - Rectangular Black Label on the back panel of a Selmer Thunderbird Twin 30 combo
| SERIAL # | MODEL | CABINET STYLE | GRILL CLOTH STYLE | |
| 10044 | Concord 8 | Croc Skin | Grey Weave | |
| 10407 | Mercury 5 | Croc Skin | Grey Weave | |
| 10650 | Bassmaster 50 | Croc Skin | Square Pattern Weave | |
| 10692 | Bassmaster 50 | Croc Skin | Square Pattern Weave | |
| 10931 | Zodiac Twin 30 | Croc Skin | Square Pattern Weave | |
| 11320 | Little Giant | Croc Skin | Grey Weave | |
| 11480 | Little Giant | Croc Skin | Grey Weave | |
| 12200 | Echo 200 | Croc Skin | ||
| 12239 | Bassmaster 50 | Croc Skin | Square Pattern Weave | |
| 12255 | Bassmaster 50 | Croc Skin | Square Pattern Weave | |
| 12366 | Zodiac Twin 30 | Croc Skin | Square Pattern Weave | |
| 12370 | Zodiac Twin 30 | Croc Skin | Square Pattern Weave | |
| 12826 | Thunderbird 30 | Croc Skin | Square Pattern Weave | |
| 12964 | Thunderbird 30 | Croc Skin | Square Pattern Weave | |
| 12986 | Thunderbird 30 | Croc Skin | Square Pattern Weave | |
| 13090 | Bassmaster 50 | Croc Skin | Square Pattern Weave | |
| 13550 | Zodiac Twin 30 | Croc Skin | Square Pattern Weave | |
| 14314 | Little Giant | Croc Skin | Grey Weave | |
| 14971 | Little Giant | Croc Skin | Grey Weave | |
| 15028 | Little Giant | Croc Skin | Grey Weave | |
| 15661 | Constellation 14 | Croc Skin | Grey Weave | |
| 15697 | Constellation 14 | Croc Skin | Grey Weave | |
| 16207 | Thunderbird 30 | Croc skin | Square Pattern Weave | |
| 16442 | Bassmaster 50 | Crok Skin | Square Pattern Weave | |
| 16561 | Bassmaster 2x12 Cab | Croc Skin | Square Pattern Weave | |
| 16622 | Mercury 5 | Crok Skin | Grey Weave | |
| 16635 | Mercury 5 | Croc Skin | ||
| 16792 | Zodiac Twin 50 | Croc Skin | Square Pattern Weave | |
| 16807 | Zodiac Twin 50 | Croc Skin | Square Pattern Weave | |
| 16844 | TnB 50 | Croc Skin | ||
| 16944 | Zodiac Twin 30 | Croc Skin | Square Pattern Weave | |
| 17175 | Zodiac Twin 50 | Croc Skin | ||
| 17375 | Zodiac Twin 30 | Croc Skin | Square Pattern Weave | |
| 17453 | TnB 50 | Croc Skin | Square Pattern Weave | |
| 17841 | Zodiac Twin 50 | Croc Skin | Square Pattern Weave | |
| 18073 | TnB 50 | Croc Skin | Square Pattern Weave | |
| 18341 | Bassmaster 50 | Croc Skin | ||
| 18742 | Thunderbird Twin 30 | Croc Skin | Rectangular Pattern Weave | |
| 19514 | TnB 50 | Croc Skin | Square Pattern Weave | |
| 20649 | Concord 10 | Croc Skin | Rectangular Pattern Weave | |
| 21540 | Little Giant | Croc Skin | Grey Weave | |
| 21971 | Thunderbird Twin 30 | Croc Skin | Rectangular Pattern Weave | |
| 23250 | Bassmaster 2x12 Cab. | Croc Skin | Rectangular Pattern Weave | |
| 23507 | Bassmaster 50 | Croc Skin | Rectangular Pattern Weave | |
| 24826 | Zodiac Twin 50 | Croc Skin | Rectangular Pattern Weave | |
| 25266 | Little Giant | Croc Skin | Grey Weave | |
| 25527 | Little Giant | Croc Skin | Grey Weave | |
| 25946 | TnB 50 | Croc Skin | Rectangular Pattern Weave | |
| 26536 | Constellation 20 | Croc Skin | Rectangular Pattern Weave | |
| 26728 | TnB 50 | Croc Skin | Rectangular Pattern Weave | |
| 26753 | TnB 50 | Crock Skin | Rectangular Pattern Weave | |
| 26861 | TnB 50 | Crock Skin | Rectangular Pattern Weave | |
| 26907 | Bassmaster 50 | Croc Skin | ||
| 27007 | Bassmaster 2x12 Cabinet | Croc Skin | Rectangular Pattern Weave | |
| 27881 | TnB 50 | Croc Skin | Rectangular Pattern Weave | |
| 28779 | Constellation 20 | Crock Skin | Rectangular Pattern Weave | |
| 29359 | Constellation 20 | Croc Skin | Rectangular Pattern Weave | |