So I am inching through my massive accumulation of Japanese coins, and the thought crossed my head that rather than picking out the "prettiest" 1 mon coins, I might as well see how many emperors I can assemble. I have seen people on here attribute these coins to a very short time span of just a few years, rather than the typical "1600s until 1869".
Obviously there is the "old legs" and "new legs" ho, where the bottom strokes of the "ho" character never touch on coins issued after 1668 (except for one scarcer provincial issue). But placed side by side, there is a considerable difference in character style, size, color, overall fineness, and whether they leap to a magnet, sorta stick to it, or slide right off.
Best reference I could find was
http://1st.geocities.jp/mrf454_pp/HTML/iKanei.htmlBut when run through a translator, the website is a nightmare to decipher, and gives no dates.
Is there a (preferably user friendly) English language guide to these coins?