La Bassée

Head post office opened in 1740.

Type 15

Large numerals

Type 16

Type 17

Small numerals

Redesigned large numerals

Type 15 + small numerals

Type 15 + large numerals

Type 15 + small numerals of the 2nd nomenclature

01/1852-12/1862

01/1863-05/02/1869

18/12/1864

03/10/1871-03/1876

Type 17 + large numerals

Small numerals of the 2nd nomenclature

As for the redesigned large numerals, they are recognisable by the hooked 4 without a head. It seems that this post office had at least 2 numeral cancels, as the standard one can be seen during and after the use of the redesigned one.

Type 16 + large numerals

17/04/1869-20/09/1871

Type 17 + redesigned large numerals

21/05/1872-24/02/1875

(Date format: DD/MM/YYYY)