The double refill has a division through the middle and holds 4 FDC’s, 2 on each side of the page. The pocket size is 220mm x 128mm.
The single refill has no division and holds larger items, one on each side of the page. The pocket size is 220mm x 265mm.
Stanley Gibbons Poland Stamp Catalogue 2nd Edition
$169.95
Stanley Gibbons Indian Ocean Stamp Catalogue 4th Edition
$199.96
Subtotal: $1,334.11