SG 40b, the 3rd watermark, Die IIB 1sh blue green. A well centered, never hinged copy with mild gum toning that doesn't detract from general appearance. 
This is the Harrison printing of 11.1920.

For the specialist, it is listed in the Australian Commonwealth Specialist Catalogue as 33B, the pale blue-green printing.

SG C.V £75, without the premium for never hinged.

I will ship worldwide for US$2, and combine lots. If this is not reflected on invoice, I will refund excess of fees paid.