Mark,
That same gentleman you purchased the Astra 600 from had a DOUBLE E/37 marked Sauer 38H the first day I saw him at the SOS. I handled it and looked it over very carefully but passed. He wanted and told me got right around $1,300 for it. I checked back with him the next day and of course it had been sold. It was pretty nice and I had never seen one before in person. Since it is reported that only about 1,000 were produced I probably won't see another one anytime soon. I should have worked a deal but I was to busy chasing down some other "I got to have" pistols! I have a collector friend back east that told me he looked for five years before he even saw one. Oh well, I will keep my eye out for another one "hope springs eternal"!