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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Linear
274-S
Hemmi
Japan
Celluloid on Bamboo
1975 Feb
25 cm
General Purpose Engineering
Notes:
"Hemmi date code ZB - among last Hemmi date codes known. dB scale suggests rule designed for acoustics. Besides this specimen which I purchased, I am unaware of any other 274-S offfered for sale."
Image 1
Image 2
