scientific instrument makers, St.Albans; orders sent to Daniel Young for brackets, ring castings, bezels, bronze quadrants etc..
Thomas Mercer Ltd
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb160-b2/b2/c3/22
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- ReferenceGB 160 B2/C3/22
- Dates of CreationJan/1951-Dec/1953