laser Goggles

[john wings]

For Sale;ive a pair of Barr And Stroud military, Laser Goggles;put on a few times,as new condition;comes in a hard case.no technical details available to me,despite google search and looking at similar goggles now for sale on ebay,except;"for operational use only;not provided to british standards"smoky brown lenses;elastic headband,side pods;the lenses look capable at least though
asking £6 in,of postage

[herbicide]

What wavelength(s) (and how much) do they block?