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Amgueddfa Cymru – Museum Wales
An advertisment for Simonis Limited "Securitas" Air Pump Smoke Helmet or Face Mask. Printed in black ink on pink-tinged paper. Text on both sides, including diagrams and illustrations. Dated November 1931. Documents 88.98I/1 (6) - (9) are secured by a paperclip. 88.98I/1 (1) - (17) were originally stored together in an acidic card file.
