All brass body
Fine spectrum through 10x10mm size 3 element design optical glass prism
Precision adjustable slit by knuried head rotatable ring
Telescopic focussing for spectrum
Velvet case packing, instruction manual
All brass body
Fine spectrum through 10x10mm size 3 element design optical glass prism
Precision adjustable slit by knuried head rotatable ring
Telescopic focussing for spectrum
Velvet case packing, instruction manual
