Historical information
Unknown
Physical description
Plastic navigational instrument?
Inscriptions & markings
2 x circles printed on either side numbering 20 to 160 .Some Japanese writing on sides. In centre has number 20K - 30K. H = 100/V =180.
Unknown
Plastic navigational instrument?
2 x circles printed on either side numbering 20 to 160 .Some Japanese writing on sides. In centre has number 20K - 30K. H = 100/V =180.