Signal scale plan, wax linen copy, numbered Sheet No. M14/1, Metropolitan line, Watford Junction last dated revision 28th July 1961.

• Physical description

  Dimensions

  Attribute	Value
  Scale	1:480

• People involved

  Role	Person(s) involved
  Commissioner	London Transport, 1961

• Associated companies, people and places

  Company

  Attribute	Value
  Line	Metropolitan,