Seiko Chronograph 6139-7100

Seiko 'Helmet' Chronograph automatic stainless steel gentlem

Seiko 'Helmet' Chronograph automatic stainless steel gentleman's wristwatch, reference no. 6139-7100, serial no. 6N5xxx, circa 1976, circular black dial with applied baton markers, minute markers, day/date apertures, inner tachymeter bezel, subsidiary thirty minute recording dial and yellow chronograph centre seconds, 41mm (lacking bracelet) , Box and Papers - no. Movement - currently functioning. Dial - good. Glass - light surface marks. Hands - good. Case - light surface marks. Crown - adjusting correctly, push buttons start/stop and reset. Bracelet - lacking bracelet.