Service de retrait disponible à United States Warehouse
Habituellement prête en 4 heures
It consists of two equal coaxial coils (parallel to each other) separated by a distance equal to the radius of the coils. The permanent magnetic compass is provided on the brass cup at the midway between them and in the same direction. The coils increase the uniformity of the fields in the middle thus making it more sensitive.
Supplied with a superior quality permanent magnetic compass box.
