Some of the frequency meters had a full complement of spare valves in spring clips inside the case. A TS-174/U (the VHF version of the BC-221) I used to own came with a full set of spare valves and a spare crystal. (That was a big surprise!)
There was also a post-WW2 official power supply with a stabilised output that was a drop-in replacement for the battery cage.
Chris.
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