2 SEIKO gents wristwatches in steel

2 SEIKO gents wristwatches in steel, Japan around 1970, self winding, 1) BELL-MATIC reference 4006-6031, screwed down case back, dark blue dial with applied hour-indices, day & date, calibre 4006A, diameter approx. 39 mm, 2) model DX, reference 6106-5430, snap on case back, including original steel bracelet, blue dial with applied hour-indices, day & date, diameter approx. 37 mm, length approx. 19,5 cm, overhaul recommended at buyer's expense, condition 2-3