Email me the pics and I'll host them for you. I've PM'd you my address.
Nice old pistols, made in the 1920s IIRC. I don't have access to my books right now but I'm sure someone with a copy of Hiller will chime in shortly.
I think complete ones sell for £300 to £400 or so, but if it's in exceptionally good condition who knows, perhaps quite a bit more. They are rare but do come up from time to time. I have a vague idea that under 1,500 were made.
I have shot one. Beautifully engineered. Very low power.