first, circa 1944, the signed circular cream coloured waffle dial, 28mm diameter, with gold coloured batons and hands, subsidiary seconds register at 6 o'clock and white metal inner bezel, signed 17 jewel mechanical automatic 'bumper' movement calibre 28.10 R.A / P.C number 10615470, case, 34mm diameter, verso, push-on with snap on outer retaining ring, plain and polished, interior signed and numbered 10700679 with Swiss marks for 18ct gold in addition to Poinçon de Maître, Hammer Head number 115 for A. & M. Favre & Perret, to a gold plated wire bangle type bracelet with fold over clasp; second, circa 1958, model 2846, the signed circular cream coloured dial, 30mm diameter, with gold coloured batons and hands, (centre sweep lacking), signed 20 jewel mechanical automatic movement calibre 501 number 16464141, with liveried crown, case, 34mm diameter, 'gold capped' front, verso snap on, stainless steel with 'Hippocampus' logo, interior signed and numbered 2846-2848 7 SC, to an aftermarket black leather strap with pin buckle (for restoration) (2) Footnote: Omega movement calibre 28.10 was built around the system of a bumper, rather than a rotor, for self-winding. Unlike modern automatics that perform a full 360-degree spin, the rotor of these bumper movements moved back and forth at roughly 120 degrees ‘bumping off’ a pair of springs on the opposite sides of the watch…an effective way of accumulating kinetic energy invented by English watchmaker John Harwood in 1923. When a watch of this kind is worn, it is sometimes possible to feel the weight as it swings, hence the 'bumper' nickname by which this style of movement is known by enthusiasts. The case of the Seamaster example was originally described as 'gold capped'. This process involved moulding a piece of gold to the shape of the watch case and placing it atop (like a cap, hence the name). This process provides remarkable wearing properties, far superior to that of a gold-plated version, together with the 'look' of a gold watch for a fraction of the price. The model reference, stamped inside the case back, includes the initials 'SC' for 'Seconde au Centre' indicating that this variant should have a centre sweep second hand, though sadly it is now missing.