Three-ft boxwood slide rule with "declination" cursor and one slide: D.Thomson
- Made:
- London
- maker:
- Robert Brettell Bate
Three-ft boxwood slide rule with "declination" cursor and one slide: D.Thomson, invt, made by Bate, London, No.276
Three-ft boxwood slide rule with "declination" cursor and one slide: D.Thomson, invt, made by Bate, London, No.276