WeiShi No.1900 Professional Multifunctional Mechanical Watch Repair Tool – Precise Timegrapher Instrument


WeiShi No.1900 Professional Multifunctional Mechanical Watch Repair Tool - Precise Timegrapher Instrument $144.44

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The No.1900 timegrapher is a high-precision instrument used for multiple tests related to mechanical watches. It’s an essential tool for watch manufacturers and watch technicians alike.


This timegrapher displays the frequency diagram of the watch on its LCD screen. Moreover, it automatically adjusts the optimal signal level based on the watch being tested. This device automatically calculates and displays rate deviation, amplitude, beat error in real-time data. It can select “+/-99.9s/d” as result display, significantly enhancing the accuracy of rate deviation by up to 0.1s/d.

One of the key benefits of this timegrapher is its adaptability. It can automatically respond to conventional beats and manually select for special beats. Its sampling periods can be adjusted to 2 seconds, 4 seconds, 6 seconds, 8 seconds, 12 seconds, 20 seconds, 30 seconds, 60 seconds – the average value within this period is identified as the precise value of the watch. The device offers six adjustable testing positions and its built in speaker can either play simulation sound or be muted.


The timegrapher offers multiple plug options including EU, US, and AU plugs. It is made primarily of durable ABS material. Its color scheme is comprised of combination of grey and black. This product is capable of measuring rate deviation, amplitude, beat error of mechanical watches, and record a diagram of the beat noise.

Other specifications include:

  • Resolution: 1.0s/d or 0.1s/d
  • Amplitude Measurement range: 100°~360°
  • Beat error measurement range: 0.0~9.9 ms
  • Lift angle range: 30°~70° with a default value of 52°
  • 1-6 adjustable measuring positions
  • Line length of 480 points
  • Measuring time periods of: 2/4/6/8/12/20/30/60 seconds
  • Language: Chinese, English, Japanese

Physical Specification

The device showcases a color LCD graphic monitor with a resolution of 480*272 pixels. It operates best in an environment of 10℃~40℃ and a relative humidity of 0~80% RH. The item weighs around 337g with dimensions of 185 * 120 * 40mm. The package size is approximately 230 * 210 * 195mm with a total weight of 1379g.

Packing List

The package includes:

  • 1 Timegrapher
  • 1 Timegrapher Sensor
  • 1 Power Cable
  • 1 User Manual