Vintage Zhongshan "six pandas" SN-2

Zhongshan 钟山 Nanjing Watch Factory.

From the wonderful Chinese Watch Wiki:

Design features

The SN2 has a number of unique design features not seen in other Chinese movements, intended to reduce costs and facilitate easy maintenance:

  • The wheel train bridge and winding bridge are a single plate
  • The mainspring barrel is uncovered
  • The keyless works uses a single part where standard designs use several parts
  • The screws have extra-large heads and the different kinds of screw have visibly different shapes

Great power reserve, robust and easily accurate enough for daily use.

Solid stainless cases and backs, too. 

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