I researched the best framing for movie posters and every collector to a person said, "Do NOT get museum glass!" #1 Reason why: If your very expensive piece falls and the glass shatters, you're fucked.It's "BALD FACED". Now sit there and let it settle that Danny from O&A had to teach you something from middle school.
I dunno, you get a quote. 18x18, museum glass, colored spacer, triple framed, OK? Have fun.