PIERCE rare self-winding wristwatch, Switzerland around 1945, shake-self-winding, winding by weight mass, gold-plated case, screwed down stainless steel case-back, silvered dial due to age patinated, Arabic numerals, luminous hands, silvered movement 17 jewels, screw-balance, incablock shock- absorber, patented, produced in few pieces, gilding partial missing, needs to be overhauled, diameter approx. 33 mm, condition 3, collectable, see literature 'Armbanduhren, 100 Jahre Entw.-Geschichte' Kahlert/ Mühe/ Brunner, Callwey Verlag