リョウ, てる, ふたつ, もろ
both, old Japanese coin, counter for carriages (e.g., in a train), two
JLPT3 G3 S6 F247
A depiction of a measuring device with long arms aligned on *both* sides → *form a pair* → *unit of weight*; (Edo period) *unit of money*. *Counter for cars/tanks* is a borrowed meaning.
[Full Kanji Etymology List]