This a pretty unusual Swiss Army Knife from the 1950s. Its model name probably was 653 G but the smooth alumin(i)um scales on this one are a much lighter shade than the, at that time, standard gold alox scales. Nowadays we would call this an alox Ambassador even though the more recent Ambassador model typically has cellidor scales.
This particular knife has the text 75 JAHRE MESSERFABRIK ELSENER etched on the main blade. Given that the Elsener knife factory was established in 1884, this Ambassador can be dated back to 1959. It has all the period correct features like the single leaf spring and the older style scissors and nailfile.
