Glass strip negs?

I’ve never seen a strip of negatives shot on glass before. Not sure if they were originally captured to glass or copied later on, but I see no reason for that so I’ll assume they are glass negs.

I’m guessing U.S and maybe 1910’s? Its a new one for me, and if anyone can shed any light I’d appreciate it.

They measure 165mm x 35mm. 5 exposures on each. I still can’t believe I’ve not seen this sort of thing, didn’t even occur to me.

stripneg
glassstrip