dates. Here's one of the references I used. As far as I understand, there is no number for zero used. There is a separate number for each multiple of ten, which doesn't necessarily resemble the corresponding 1s digit. So 20 = ፳, its own single symbol, which is not similar to 2 = ፪ etc. Numbers helpfully have brackets above and below them, which make them easier to distinguish from words. Thousands and hundreds are represented by a tens multiple plus a units digit, followed by the character for 100: ፻. So for the top two coins, the dates are both ፲፱፻፴፮, which is the characters for: 10, 9, 100, 30 and 6. That indicates 19 100s + 30 + 6 = 1936. The Ethiopian calendar is a Christian calendar, but it differs from the Gregorian calendar by being 7 or 8 years later in its starting date, which is based on the Annunciation. So 1936 in the Ethiopian calendar is 1944 AD. The Ethiopian calendar starts around September, and is a solar calendar. Because the New Year dates don't line up, the difference is 7 years behind from Sep - Dec, and 8 years from Jan - Sep or so. But for most coins you can just add 8 to the Ethiopian year to get the AD year. The third coin is dated ፲፱፻፷፱, which is = (10 + 9)*100 + 60 + 9 = 1969 = 1977 AD. The coins are clockwise from top L: 5 Santeem, 1944; 10 Santeem 1944; 50 Santeem 1977. I'm still a complete beginner, so please feel free to point out any errors or helpful resources, or to post any other Ethiopian coins!