I have a Hartzell constant speed prop for sale
Model HC-C2YK-1BF
s/n CH3380
Blades are type 7666A
length tip to tip is 73 inches.

Prop was overhauled in 1990 then put on the shelf and never used.
I tested it last year and it does cycle and is free of leaks.

price is $2000, plus shipping.

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Jeff Peterson
412 478 1918