Holley Aircraft Carburetor - Information appreciated

[Mrpro4]

Recently picked this up from an estate and can't find much online about it. What was it used on, for what years, approx value, etc..any information is appreciated.

 

[MiTasol]

Used on A-24A

 

[Buster01]

You might find this interesting. For this particular model read this:

History of Aircraft Carburetors Chapter 7 - The Holley Floatless Carburetor.