2001 GB - Centenary of Submarine Set (4) from DX27 (2) MNH

SG2202a - 2205a Royal Navy Submarines set of 4 ONLY available from Unseen and Unheard Prestige Complete Pane 2 (DX27) as singles.

Perf 15½ x 15 (Equivalent sheet stamps perforated at 15 x 14)

Issued: 22nd October 2001.

Note: Each stamp will be supplied as per the image.
For provenance, measure the perforation from as it is different from the sheet stamp.