细节
A spectroscopic accessory,
by R. & J. Beck; a quantity of part-spectroscopes, a quantity of prisms, lenses and other optical items; a quantity of optical bench accessories and two cases of mineral samples (A lot)
by R. & J. Beck; a quantity of part-spectroscopes, a quantity of prisms, lenses and other optical items; a quantity of optical bench accessories and two cases of mineral samples (A lot)