I have an Ohaus 505 that I bought new in 1971, IIRC... it's still going strong. I "tune" it each time I use it by blowing the dust off the pivot points. I finally got around to buying some check weights a few months back, and the scale is dead on.... to less than a half tenth.
I think, amortized out, that is around 1/10 of a penny per day to operate.
K.I.S.S.

I think, amortized out, that is around 1/10 of a penny per day to operate.
K.I.S.S.

