Thanks for taking the measurements.
The diameter of the ammonal container I measure as 38mm on the tinplate body, 40mm on the soldered end caps, so it would fit comfortably, glued in with some pitch. It is not proof positive that the casing you have is a No.13, but certainly supports the possibility that it is.
The diameter of the ammonal container I measure as 38mm on the tinplate body, 40mm on the soldered end caps, so it would fit comfortably, glued in with some pitch. It is not proof positive that the casing you have is a No.13, but certainly supports the possibility that it is.