Karl,
  thanks for staying 
  with us !
   
  I think it is a 
  K250 indeed, but I'm not sure. When I took the pictures I was heading Key West 
  leading a bunch of guys barely interested in subs and didn't want to spoil 
  their fun, taking the time to ask around. The only thing inside was a crank to 
  spin the propeller.
   
  NOAA wanted to 
  turn the Keys into a sanctuary and diving, fishing, etc would not be allowed 
  anymore, so the shopkeepers were protesting trying to defend their businesses 
  (not too dificult to understand, there are many fishing, boating and diving 
  shops all way down Key West). I don't know what happened. If someone knows, 
  please, let me know...
   
  Best 
  regards