A buddy of mine gave me this Cartridge Indicator Chart dated 1952 yesterday.
Pretty cool! I wish it was in better condition, I'd have it framed.
The name of the guy who created this chart was Norman Leroy Avery.
I wasn't able to find any information on the internet on him or the chart.
Pretty cool! I wish it was in better condition, I'd have it framed.
The name of the guy who created this chart was Norman Leroy Avery.
I wasn't able to find any information on the internet on him or the chart.