SEIKO gents wristwatch with chronograph, Japan around 1970, self winding, reference 6138- 8030, stainless steel case including bracelet with deployant clasp, screwed down case back, dark blue dial with raised hour-indices, blue sub-dials, white hands, tachometer graduation, day & date, calibre 6138B, 21 jewels, length approx. 19,5 cm, condition 2-3