I had one ~15 years ago, it was a stainless Erma-made Walther PPK/S look-alike. Mine had a single digit serial number.
Quality was typical Erma: it broke the firing pin within the first 100 rounds. Charter Arms was going out of business, and I was unable to get the part. Had to machine a new one, took me most of the day to turn, mill and surface-grind it.
I was ecstatic when a collector offered me good money for it, good riddance!
LT