JNF/Jewish National Fund/KKL 1931 2x stamp panes of Map of Israel in brown MNH

JNF/Jewish National Fund/KKL 1931 2x stamp panes of Map of Israel in brown MNH
JNF/Jewish National Fund (KKL) stamps & labels: Israel Head Office/Jerusalem pre-State issue, 2x brown pane set of the 1931 issue 'Map of Israel' childrens' stamp puzzle, either published in booklet 1 or 3 of the issue; line rouletted, MNH & OG: with staple holes in left gutters & thin separation sheets in between; one pane has a light diagonal crease at the top right corner & small fold at bottom left tip of the selvedge (Roch 207-218 / Kaplove 1258-1269 - lists this as a 1950 issue but unlikely).