Name: Faltbare PV-Speicherlösungen
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Tongji 7120 Energiespeicher

Energiespeicher sind ein zentrales Element für das Gelingen der Energiewende. Sie ermöglichen die (partielle) Entkopplung von Energieproduktion und Energieverbrauch, indem sie überschüssige Energie speichern und bei Bedarf wieder abgeben können. Heutzutage werden Energiespeicher insbesondere im Bereich Mobilität und Wärmeversorgung eingesetzt, doch

When was the first Tongji watch made?

In 1974, Shanghai Watch Factory marketed its first Standard Movement (tongji) watches. A number of different models were manufactured, but probably the model produced in the greatest numbers was the 7120, a tongji watch without calendar in a stainless steel case. This is an early 7120, one of the earliest.

What is a Tongji watch?

Greetings. Well, the tongji movement was originally designed as the everyman's watch movement as dictated by the government. Initially, I believe, they were all hand winders and of roughly the same quality; that is, tough, reliable and if serviced would run forever. Over the years, variants began to emerge.

What is a 7120 caseback?

A number of different models were manufactured, but probably the model produced in the greatest numbers was the 7120, a tongji watch without calendar in a stainless steel case. This is an early 7120, one of the earliest. Early 7120 casebacks are different from most 7120 casebacks; they look a lot like the ones found on 1524 models.

How long does a Tongji automatic last?

The actual power reserve, while not at the level of most modern, low cost automatic movements, is fine for daily use. If they are fully hand wound, these Tongji-based automatics will last 26 to 32 hours. The barrel clutch, commonly found in most automatic caliber to prevent overwinding, reduces the power reserve.