Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map in either miles (1/10ths) or kilometres.

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map up to 15 kilometres in 0.5 kilometres.

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map in either miles (1/10ths) or kilometres (2/10ths).

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map in either miles (1/10ths and fractions) or kilometres (1/10ths).

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map in either miles (fractions) or kilometres (1/10ths).

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the a 1:50,000 map in kilometres up to 5 kilometres, or on a 1 to the mile map in miles up to 5 miles. (The latter is to the scale of 1:63,360).

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map in either miles (up to 1 1/2) or kilometres (up to 2 1/2).

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to easily read off compass headings N, S, E and W

Product description

Clips into the bottom of the Don Barrow Potti. Enables you to read off distances on the map in either 100 yards, 1/10ths of a mile or fractions of a mile.

Product description

Product description

For maps of scales 1:25,000/1:50,000/1:100,000 and 1:200,000. Size 5 inches x 3 5/8 inches.

Product description

Two Pen/Pencil Sleeves for clipping on to mapboards or a convenient point in the car. Know the whereabouts of you pens or pencils and have them to hand ready to use

Product description

The most successful road/rally navigator ever, Don Barrow, invented this map reading aid, the Potti. A light excluding tube with large crystal glass magnifying lens for your map reading. One control provides adjustable clear or red light...