Seclin

Head post office opened on 1 January 1837.

Type 15

Large numerals

Type 16

Type 17

Small numerals

Type 15 + small numerals

Type 15 + large numerals

Type 16 + large numerals

01/1852-12/1862

01/1863-03/11/1868

14/06/1869-15/06/1871

14/07/1871-03/1876

Type 17 + large numerals

(Date format: DD/MM/YYYY)