Up for sale here is this used vintage Simpson DC amperes meter. This is in great shape and is guaranteed to work. It's a nice little meter.  Cosmetic condition is good but this has light overall wear and has a bit of brownish stuff on the inside of the plastic window, so you would want to open it up and clean that out.  Please see my pictures for details and dimensions.

US shipping and handling is $5, and international is $18. If you have any questions, please ask.

I have more meters & gauges and other vintage electronics listed--feel free to take a look!