Possibly some sort of third rail shoe grip thing, so I'll have a guess with Class 377
MK 1?
MK 1?
Class 47?
Class 67?
Class 70?
Not a 70Class 70?
not a tamper.Tamper?
Not a stoneblower, it isn’t an OTMStone blower?
Not a 50, although they are as popular as eachotherClass 50?