Got my letter from jinks....
My 547 serial number 9D376XX was shipped from S&W factory on April 1st, 1982, and delivered to Wischo-KG-Wilsker & Co, Erlangen, West Germany. The revolver was shipped with a 4 inch barrel, blue finish and checkered walnut square butt grips.
Cool stuff.
That makes sense as the proof mark (the emblem in the middle, which has a checkered appearance) indicates it was proofed in the Munich proofhouse, you should have a similar proof mark under your barrel and on your cylinder as well. The other marks indicate it's been proofed with smokeless powder (the German eagle with "N" for nitro) and the proofer which proofed your 547. You really should keep that 547, there's few like them, and for a German proofed, pinned barrel, even fewer. I can't quite tell from the photo, but it appears the Munich proof house stamped the "P" after 9mm on the barrel. They do that in Germany because there are several cartridges of the 9mm caliber, 9x17, 9x18, 9x19, 9x21, just to name a few, and the 9x19 is referred to as "9MM Parabellum" (not "Luger" as in the US). I hope they stamped your barrel better than mine:
When proofing, the Germans will fire a 20% overcharged round, and to be accepted it must do this; they also inspect chamber sizes and dimensions very carefully. Literal proof that the 547 is a sturdy revolver, plenty good for +P stuff, though mine just gets regular.
It makes me a bit sad hearing the awesome prices some have gotten theirs for, I paid premium for one, and near premium for my German proofed one and consider myself lucky. If I had it to do over again, I wouldn't hesitate. Not sure it really cost S&W that much more to make them, but the 547 is my favorite, and that is saying a lot. I could go on and on about why I think 9x19 is so great in a revolver, but suffice to say S&W is just not going to make any more, and if they do, you can bet it won't be with this extraction system. I don't just think they are collectors, but serious shooters, especially considering the enormous amount of 9x19 ammunition selection which seems to have no problem standing the test of time.