Found this in a box of parts and can’t find any info about it. Collectible, rare, worthless, or worth holding on to? Any opinion or knowledge is appreciated, thanks!!
It is of no value for a mechanic as the new instruments will do the calibration easier. Don’t know if it is rare. But I would be interested in it as it will go well with my other merc instuments like my thunderbolt engine analyzer and my merc-o-tronic. I don’t have that so I would buy it off you. What are you asking?