Re: Familiarity with Window Company
The "test house" or "demonstrator in the neighborhood" is just a marketing ploy; one might call it a ruse. It seems like they have a ready built-in answer to why they have no local references if asked for them.
I am biased, as a preservationist I particularly despise replacement windows. They replace the money in your pocket with windows that will have problems after 15-20 years, and your restoreable, lifetime, irreplaceable wood windows are landfill. What a waste.
It started in the 20's with the stucco men embalming older homes with a cement skin (shout out to Garden State Brickface) then in the 50's - 70's the tinmen sheathed the remaining old houses (mine included) in Maintenance-free Aluminum Siding (tm) , but in these cases the original materials were still in place, buried and decaying though they may be; these window shysters are a far worse sort, physically removing and destroying original fabric with an expensive and short-lived substitute product.
Remove not the ancient landmark, which your fathers have set.