Hand spectroscope

 

R & J. Beck, London
Lacquered brass hand spectroscope (length 10 cm) with adjusting wheel and brass screw-cap in its black leather covered hinged case lined with blue velvet and purple silk (11 cm x 6 cm).
Signed “R and J. BECK. LTD | London”

private collection

Hand spectroscope, R & J. Beck, London

Hand spectroscope, R & J. Beck, London