A rare and mysterious model, this one features a stainless steel screwback case rated to 200m, rocking a thermometer and rotating bezel. There may be a temperature logging function, as the time comes up on the LCD in the ‘temp’ mode but lacking the manual and a serious effort to figure it out, deciphering its intricacies is an exercise left for the buyer. Age unknown; the module number doesn’t appear in the most comprehensive list I’ve yet discovered, so this one is pretty obscure. Adjacent module numbers are from the mid-90s.