"Another interesting and informative big E. Some "off the top of my head" opinions about Mike Jones's queries:

1. [Ramsden] Most of Ramsden's monographs are uncommon. The mother lode, and the source of many of them, is "The Philatelic and Numismatic Journal of Japan" (or something similar), where many of his numismatic contributions first appeared. I believe it ceased publication upon his death.

2. [Munro] Not a rare book. Guess on original printing: 1000 or so copies.

3. [Schjoth] Ditto.

4. [Polder] I believe I've had this a few times as an extract from the publication in which it originally appeared. I do not recall offhand whether it was issued separately.

5. [Kann] Ditto no. 2.

6. [Toda] I recall having the original once or twice but I would guess it is truly a rare work. There is some sort of a reprint I believe.

A Bowker bibliography (if your interest is limited to English publications) or a Coole bibliography (it incorporates Bowker and oh so much more) should provide further information."

"In response to Mike Jones' request for information on the scarcity of several references about East Asian coins. Number 6 on his list is Toda on Annamese. I have an original edition of the society's journal with Toda's article about Vietnamese cash-style coins. I made the high bid in a book auction about 20+ years ago and have not seen another original since that time. But copies of Toda have been printed by several dealers for collectors to use and I believe Scott Semans probably has one of these copies for sale."

"I have never found Van de Polder in the marketplace; my Xerox copy is from the University of Washington library, c1971.

Ramsden’s Numismatic and Philatelic Journal of Japan was reprinted in its entirety (four volumes bound in two) in the ’80s. I've never seen another copy of the reprint besides mine. I have the odd reprint of various other Ramsden works as well, and some original booklets/folders of hansatsu sold by Jun Kobayagawa, Ramsden’s business partner in Yokohama (either Ramsden’s son-in-law or brother-in-law, I can never remember which).

The original Munro appears every couple of years in auctions, and the 1962 reprint about once a year. Original Todas appear every few years, but that was reprinted by Bruce Smith several years ago.

Original Kanns on Chinese coinage appear about once a year; it was also reprinted. Much more scarce is the 1927(?) Kann on currency systems and exchange rates, which has also been reprinted.

The original Schjoth appears every couple of years; I never bought one because the Hancock edition has so much more information in it."