Original window manufacturer; Alenco 1999 or 2000.
I am thinking that the top guide is a 19-005 and the bottom guide is a 15-001.
The dimensions all fit except the depth of the shoe on the bottom is not a full 1 1/8" like a 15-001, but it is more than 1" like the 15-002. I think that reflects 18 years of wear.
