there are any number of these laying around, if you know where to look.
all the Cornish mines and every tunnelling contractor in the country used them, they could be renewed indefinitely by replacing the wearing parts.
they have been pretty much rendered unusable by HAVS regs so they are just surplus to requirements now.
''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.