I've gone a bit more cultural specific than I originally planned, but I'm still going faceless with my money plans. This currency is for the L.U.N.A.R (Lunar United Nation of America and Russia) who have created an independent Moon nation.
The Russian is (for what I can tell) is an equivalent word for tide meaning "inflow". "Inflow" and "outflow" where the title of the Russian equivalent page of tides on Wikipedia. I know there's probably a better word or a cognate, but for this project I think it should work.
The circles in the middle are phases and the more light shining on them, the more they are worth.
I haven't changed the serial number on the 5 Tide bill yet, I just noticed that now.