[Dentistry] Lot of 8 trading catalogues

Early 20th century, written in German, contains many ills., orig. covers. Some names: Alfred Becht (Derfla), Wienand Dental A.-G., Siemens-Reiniger-Veifa, Carl Martin and De Trey & Co.

Most of these catalogues have been designed nicely and contain images that are not fit for people who have a fear of dentists.