Trillium Door Window

[Koukoune]

Hi everyone, does anyone could help me identifying the brand and model of this window? It was on my Trillium 1300 door but I think it's not original. Probably installed by a pre-owner. I looked everywhere, inside and outside for a model number but found nothing. The 4 other windows of the trailer are Hehr brand but the aluminium extrusions, mechanism, screws and seals are different on this one. I need to replace the seals.
Thanks for your help,
Stéphan

[John in Michigan]

Could be a Berdick brand window. The side windows on my Boler 13 were Berdick. They look very similar to Hehr.