Signal scale plan, wax linen copy, numbered Sheet No. N26, Northern line, Belsize Park, Chalk Farm last dated revision 11th September 1937.

• Physical description

  Dimensions

  Attribute	Value
  Scale	1:480

• People involved

  Role	Person(s) involved
  Commissioner	Northern line, 1937

• Associated companies, people and places

  Company

  Attribute	Value
  Line	Northern,