Posted by Chriscase [76.212.162.152] on Saturday, March 06, 2010 at 09:13:29 :
In Reply to: Re: Ok, I'm lost. What years did they....? posted by Dana (in Lancaster) [71.232.236.112] on Saturday, March 06, 2010 at 07:48:07 :
Vertical louvers = 1/2 ton, early WWII
Horizontal louvers = pretty much lots of interchange.
Not much interchange between verts and hors.
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