Includes makers name plate 'Negretti & Zambra London'. Service sticker attached show the instrument was tested and calibrated by T.E.R Instruments Ltd. 18.6.91; reference number 129757.
Includes makers name plate 'Negretti & Zambra London'. Service sticker attached show the instrument was tested and calibrated by T.E.R Instruments Ltd. 18.6.91; reference number 129757.