BWC chronograph, manual winding, reference 905003, Switzerland around 1965, gold plated metal case, screwed down stainless steel case back, silvered dial with raised indexes, 45 minutes-register, 17 jewels, calibre Landeron 248, incablock shock-absorber, Runddrücker, signs of use due to age, diameter approx. 35 mm, condition 2-3