Archival material relating to the firm of H.N. Irving & Son, instrument makers

Negretti & Zambra Ltd. Business file.

Paid invoices. Business file.

Drawing No. 258/34

Drawing No. 100-3109

Advice Note 3901 - 4000

Berco Controls Ltd. Business File

Advice Note 2501 - 2600

Negretti & Zambra Ltd. Business file.

Drawing.

Completed orders T. Business file.

Business file I

Order Book 3601 - 3700

Completed orders N. Business file.

MM02 Share Certificates

Letter.

Monochrome photograph of a roadway and distant valley, object marked with a cross. Size 200 x 250 mm.

Advice Note 2701 - 2800

Mechanical Engineering Research Laboratory. Business file

Miscellaneous Correspondence

Order Book 3301 - 3400

Architect. Personal File

Air Pump Photographs.

Negretti & Zambra Ltd. Business file.

Drawing No. 258/33

Challenge Receipt Book W

Challenge Receipt Book A1

Advice Note 901 - 1000

Parcel Post Receipt Book

Sketches and drawings

Miscellaneous Correspondence

Challenge Receipt Book U

Enquires M. Business file

British Petroleum Co. Ltd. Business File

Completed orders P. Business file.

Drawing.

Letter.

Advice Note 2601 - 2700

Clarke, Chapman & Co. LTD. Business file.

Contents sheet.

Trade Literature.

Parcel Post Receipt Book

Trade Literature.

Completed orders G. Business file.

Order Book 2401 - 2500

Advice Note 3301 - 3400

Business file B

Malcolm Bell Ltd. Business File

Postcard

Completed orders E. Business file.