SEIKO intermediate wheel chronograph reference 6139 - 6010,...

SEIKO intermediate wheel chronograph reference 6139 - 6010, self winding, Japan around 1970, stainless steel case, screwed down case back, blue dial with raised luminous indices & luminous hands patinated, display of hours, minutes, day, date & chronograph, calibre 6139A, 17 jewels, central rotor, flat rim balance, flat hairspring, diameter approx. 39 mm, needs to be serviced, condition 3