Original price was: £400.00.£340.00Current price is: £340.00.
1971 MACHIN ‘POST OFFICE’ PHOSPHOR REMOVAL ‘IMPERF’ TESTING TRIALS 1p & ½p ENDORSED ‘ABET’ (acetone, butanol, ethyl acetate, trichlorethylene, being the chemicals applied). Ex. Norman Potter archive with copy of his report & issued stamps.
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1971 MACHIN ‘POST OFFICE’ PHOSPHOR REMOVAL ‘IMPERF’ TESTING TRIALS 1p & ½p ENDORSED ‘ABET’ (acetone, butanol, ethyl acetate, trichlorethylene, being the chemicals applied). Ex. Norman Potter archive with copy of his report & issued stamps.
