Just picked this up today and I know there are a couple 131.4's out there with thick dome glass. Maybe this will shake loose the domer 131.4 for me while still giving you a dated 131.4 to fill the same spot on the shelf.
Pictured next to a regular bluish aqua brk.
I also think this is an unlisted color. I would call it Light Sage Green. Or is this what they are calling sage green?