Three Dall null testers on two stands

Made:: 1950-1975 in Luton

maker:: Horace Edward Dall

Three Dall null testers on two stands, plus lamp and box of accessories

Details

Category:: Astronomy

Object Number:: 1987-528/13

type:: optical testing instruments, null testers and personal property

credit:: Dall, H.

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Three Dall null testers on two stands

Details

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