my coins collection

The real fun I've had these last few years is trying to analyze coins that aren't dated like ours, not by the year AD.  Some have their own religious calendar, and may be further ahead, like Israel or Thailand, or further behind, like the Middle Eastern countries.

Then, there are the ones from China (by year of Republic) and Japan (by year of emperor).

I've had some help via a World Coins book or two, with keys on how to read their numerals and how to calculate to our era.  I've even made notes for when I go to fill in some gaps!