Keywords: Zeiss di Merate - quadro elettrico e pendolo.jpg Telescopio Zeiss di 1 metro di apertura dell'Osservatorio Astronomico di Merate quadro elettrico pendolo e cronografo 1 meter Zeiss telescope at Merate Astronomical Observatory Merate LC Italy Electrical Image shows the master clock system; a precision astronomical regulator clock with an Invar pendulum wired to a paper tape time signal recorder right Old photo album at Merate Observatory Italy anonymous picture scanned from Il riflettore di 102 cm della R Specola di Merate - Ulrico Hoepli Milano 1929 1926 CAV PD-old Observatories in Italy Merate Reflecting telescopes Precision pendulum clocks 20th-century clocks Master clock |