6868
A Celestion bass unit. 175mm outer flexible rubber dimension.
This is marked Ditton 150- but doesn’t have an original part number on it… but AFAIK there are 2 versions of the 150 and this doesn’t fit one of them, so please check the picture and dimensions match before ordering. If in doubt PLEASE ASK and I’ll check more dimensions for you..
It does look the same as a 15XR bass unit too… but don’t take my word for it.