There are twin recessed black subsidiary dials, including a running seconds register at 9 o'clock, and a 30-minute chronograph totalizer with a red 5-minute regatta countdown wedge. It has luminous broad arrow steel baton hands, and a center sweep chronograph seconds hand. There is a black dial with luminous baton hour indices around an outer minute/one-fifth second scale, twin luminous dots at 12 o'clock, and the perimeter has a tachymeter to 600 UPH. The 38.5mm diameter solid two-body case, downturned lugs, and bi-directional rotating flat bezel with a 60-minute dive scale with Arabic numeral hour markers every five minutes, are polished/brushed. SWISS.' It has a black bi-directional 60-min bezel with 2 time zones. There are round chronograph push buttons with a screw-down winding crown, and a solid screw-down case back, inside of which is hand tooled a sunray pattern and engraved with 'CROTON INTERNATIONAL WATCH CO. It has a shell cordovan strap with a stainless steel tang buckle, and a scratch resistant sapphire crystal. 1970's stainless steel Croton Chronomaster Aviator Sea Diver 9870. More about Vintage Chronomaster Aviator Sea Diver SS

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