Window beading

Question

Work for an apartment complex built around 1973, having trouble sourcing replacements, since replacing all the windows on property isn't feasible currently (approx. 850-950 on property, half of which need the beading), we've been trying to find a more secure solution with no luck.

Tom · Accepted Answer

I'm sorry to say that I don't recognize this beading, either. This is unlike anything I've ever seen before.

Would you happen to know the name of the company who made the window? Being so old, I would understand if that's not information you can find, but it may at least point us in the right direction.