The maps are inserted on fold-out sheets at the rear of each volume.

Sixth state of the slipcase.

Available 1961 to 1964.
Price 63s.

More than 8,000 sets produced??

Boxed in 18 batches:

Starting in July[?] 1961 and continuing until September 1964.

Information for 1961 is very patchy, so additional sets may have been made at that time.

Slipcases manufactured by Jarrold & Sons.

Covered with grey textured paper.
No price printed on label.
Two piece construction.
Staples in top and bottom panels.
No join running down centre of top and bottom panels.

Includes various impressions 1961-63:

FR - 10th to 13th Impressions
TT - 8th to 10th Impressions
RK - 7th to 10th Impressions