A Type 02A dry card compass with Azimuth circle, upper ring stamped 'Azimuth Circle No. 4 Ref. No. 6a/890' and 'No, 2605. H.', with prism and shades mounted in brass bowl with spring suspension, in fitted wooden case with instructions for use in the lid

細節
A Type 02A dry card compass with Azimuth circle, upper ring stamped 'Azimuth Circle No. 4 Ref. No. 6a/890' and 'No, 2605. H.', with prism and shades mounted in brass bowl with spring suspension, in fitted wooden case with instructions for use in the lid