Unique No. for this case is 3773.  New, unused PORSCHE DESIGN ORFINA Military Chronograph CASE BACK 7177 Unused Military Case back only.  36mm diameter.  Case back marked: PORSCHE DESIGN ORFINA MILITARY CHRONOGRAPH 7177 DOD. DEPT. INT. (Specific No. assigned to each individual case; No. 3819).  Also marked on the outer rim; WATERRESISTANT TESTED 10 ATM AUTOMATIC SHOCK PROTECTED STAINLESS STEEL SWISS MADE.  INSIDE BACK CENTER MARKED: ORFINA WATCH LTD. SWISS.  This screw off military case back has never been applied to a watch.  Comes with the factory protective seal.  THIS IS A FINE COLLECTIBLE. DON'T INVEST IN THE STOCK MARKET. BUY SOMETHING PROVEN IN TIME. 

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