DIN 8313-2:1977 Technical requirements and verification for clocks and clockmovements with electrical energy source; frequency of resonator 1000 Hz, terms of delivery for clock movements
Technical requirements and verification for clocks and clock movements with electrical energy source; frequency of resonator ≤1000 Hz,terms of delivery for clock movementsExigences techniques et méthode de contr?le pour horloges et movements d'horloge av
1977DIN 8313-2:1977 Technical requirements and verification for clocks and clockmovements with electrical energy source; frequency of resonator 1000 Hz, terms of delivery for clock movements