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50 USD
50-100 USD
IIRC early 70s
Somwhere between 1956 and 1985
Need the serial number.
Blast furnace calorific value is 780 Kcal/hr
No sn data for that model I can find.
"M" prefix indicates 1952
Impossible to answer without the serial number.
i just saw 1 sold on gun broker the 30th of September for $160
"AU" prefix indicates 1980
10-100 USD or so