This is a marvelous thread! Frank, your excellent photography of your amazing collection - as always - stands alone. The close-ups of the HW and Walther DST's are very interesting indeed.
I notice both your HW DST's have the long trigger block. The only DST I own is an HW 55 with the early short trigger block. I'm away for a few days but now I'm very curious what differences it might have! I'll post pics when I can.
Frank and Danny, as an aside I'd be very interested to know what type of lighting and cameras you use for your pictures. They are consistently of archive quality.