Serial number/date code gives a production date of 13/09/1978. This is a 55hz speaker, not the 75hz version. It works great but if you're looking for. It works great but if you're looking for modern reliability by a new re-issue.
Celestion Blackback G12M 55Hz 25 Watt 16 Ohm 1978 T1511
Replacement Celestion G12M Thames Ditton speaker labels.
Celestion G12M-65 Creamback 65 watts, 16ohms, 75Hz, UK MADE. NEW
Celestion Hempback 12" G12M-50
Celestion 1960s Thames Ditton 10in 8 Ohm 9289W speaker NAF1ZK cone
Celestion Guitar speaker (T6382)
