Serial number prefix for Apeks, Sherwood, or Tusa brand MH8A transmitter

[scubadada]

I am interested in the serial number prefixes for all brands of Pelagic Pressure Systems MH8A transmitters. To date, I have not seen prefixes for Apeks, Sherwood, or Tusa branded transmitters. If you own one of these transmitters, please post the serial number prefix. If you own other brands and the prefix does match those in the linked list, please point that out.

Question - Serial number prefixes on Pelagic Pressure Systems MH8A transmitters

I’m thinking that they likely do the refurbs in batches and give them all a new outer shell with the R marked refurb date as @scubadada noted was present on his. I’m thinking the new parts content is likely even higher. Outer shell takes the most abuse, so is likely replaced. The circuit...

scubaboard.com

Thanks