I am very familiar with Frey's dictionary. As a teenager 60 years ago I purchased two copies, cut out each entry and pasted them on color-coded cards. I learned Frey is overloaded with coin names and denominations. I was more interested in the scientific terms in the numismatic field.

When I retired I had time to write the book I had in mind. It became my Encyclopedia of Coin and Medal Technology.

I made a study of the existing numismatic dictionaries in all languages, plus some of the better glossaries.

I doubt Frey is available digitally. I have long since advanced from Frey to other dictionaries. I selected only terms of universal use in numismatics (not denominations and coin names of limited scope).

If you understand German, I recommend Schroder, Worterbuch de Munzenkunde. {1930}

Mentioning Frey brings back a flood of memories. I remember that color code for Frey's terms; pink cards for coin denominations, blue for coin names, green for paper money terms, white for economic terms, odd and curious, miscellaneous, and salmon color for technical terms. It was the salmon terms that held the most interest for me.

In my sophomore year in college I took a course in philosophy, the professor instilled in me an interest in words and their meanings. After that year I thought I would never go on to college, so I planned to teach myself. I wanted to learn numismatic terms so I bought the most expensive Webster's Dictionary. It was leather bound and had a history section in the back. I loved that book. I poured over it for hours, copying terms and entered these on my color cards. That dictionary is still in my library -- now with broken spine and dog-eared pages.

After four years in the military service I was able to go back to college, Washington University in St. Louis. I had an apartment off campus and filled it with numismatic books, and that file of colored cards. Eric Newman visited me several times in that apartment (he lived on one side of Washington U campus, I lived on the other). We talked for hours about numismatics and the books on my library shelves. And also that card file of terms.

Years after college I moved from one job to the next. I never lost interest in numismatic terms, however (but did dispose of that card file along the way). In retirement I gathered all those terms again and wrote Encyclopedia of Coin and Medal Terms.