Jim,
I think the pricing/value in the USA for the 06's will be much higher than $ 600 figure you got from CH...
Bern M1906's seem to run in the $ 1500 to $ 3000 price range...depending on condition and original finish.
DWM M1906's seem to run in the $ 2500 to $ 3900 price range...ditto...ditto...
Simpsons has started doing their "importation stampings" very lightly and small in the half-round cut-outs of the grip straps where the magazine inserts...barely noticable...
Be sure and post more photos when you finally get your family's pistols here in the USA...Good Luck !
Regards,
Pete...