Overall view of the turbine. There are actually two turbine wheels; this is
the upper (second-stage) turbine wheel.
Gas from the combustion flask enters the turbine housing to spin the turbine
The torpedo case is stamped with the following aft of the circular cut-out:
Afterbody Mk. 23
Serial. No. 2795
Tor. Sta. newport
Reg. No. [blank]