Signal scale plan, wax linen copy, numbered Sheet No. N29, Northern line, Brent last dated revision 7th July 1938.

• Physical description

  Dimensions

  Attribute	Value
  Scale	1:480

• People involved

  Role	Person(s) involved
  Commissioner	London Transport, 1938

• Associated companies, people and places

  Company

  Attribute	Value
  Line	Northern,