History lesson required.

[mrgas]

Does anybody know the approx dates that local water boards used to stamp their unique mark onto individual components of a water fitting.
Especially interested in the Met water board.
TIA

 

[voiceofthemysteron]

Does anybody know the approx dates that local water boards used to stamp their unique mark onto individual components of a water fitting.
Especially interested in the Met water board.
TIA

Don't know that one but i do remember British Gas used to stamp their copper tube in the late seventies early 80's which made it a little more difficult to sell by the bundle

 

[jeff the gasman]

Approximately mid 60s or a bit earlier.