There was also a unit of currency that some Esperantists proposed called the "Spesmilo." A few banks used it prior to WWI (one of which was a bank called Ĉekb

There was also a unit of currency that some Esperantists proposed called the "Spesmilo." A few banks used it prior to WWI (one of which was a bank called Ĉekbanko Esperantista that conducted its business in Esperanto). Its legacy lives on in the modern age in a Unicode character for the currency: ₷