Q: What exactly is a 7S module?
A: The 7S is a newly developed replacement movement for vintage LED watches. It is built on a modern circuit board and designed to replace failing or non-functioning electronics in OMEGA, PULSAR, HAMILTON and SYNCHRONAR / SUNWATCH models. The original LED display, plastic carrier and reed switches are re-used so the watch keeps its authentic appearance. 

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Q: How is the Synchronar and Sunwatch LED watch exchange carried out?
A: The new circuit PCB is paired with your original parts. The watch will be fitted with either an original 1970s Monsanto dot-matrix 7-segment display or a Litronix bar-style 7-segment display, according to the customer’s preference. It will also include a new solar cell, new reed switches, and new rechargeable Varta V40H or V80H batteries. The watch therefore remains unchanged in appearance on the outside (exept new bottom) while benefiting from modern electronics inside.

The price includes removal of the old, non-working module from the plastic casing. In some cases, the original plastic casing is not salvageable due to brittleness caused by age. If this is the case, a new plastic case will be required at additional cost. The customer may inspect the case beforehand; visible cracks in the plastic casing usually indicate that it is not salvageable. Each case is assessed individually.

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Q: Synchronar and Sunwatch "Day light saving - DST" time for EU and US.

A: It works only for the standard DST rules used in most of mainland US and mainland Europe. It does not cover regional or local exceptions. Users can also turn DST off in the DST menu by selecting OFF. Then no automatic DST change is applied.

 

Q: Can you still repair the vintage led watch circuits?

A: We can attempt repairs, but results are not guaranteed. Due to the age and fragility of the old technology, success rates are limited. For a dependable solution, a new 7S module is always the better choice.

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Q: Should I send just the module or the whole watch?
A: We recommend sending the complete watch head (without bracelet). This allows us to correctly align the new circuit with your reed switches and ensures that you receive a fully functioning timepiece.

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Q: My watch shows nothing after delivery – is it defective?
A: Most likely not. In some cases, the buttons are pressed during transport, draining the cells. Simply install a pair of fresh batteries with the correct polarity and the module should start working.

 

Q: Which batteries are suitable for the 7S?
A: For battery-driven models we recommend Varta V13GA, V76PX or V357. Alternatives such as LR44, #357, #1154, AG13 or SG13 also fit. For SYNCHRONAR / SUNWATCH, rechargeable Varta batteries are supplied with the module.

 

Q: Do you provide warranty coverage?
A: Yes, every new 7S led watch module comes with a one-year warranty. Please note the warranty covers the module itself, but not the original LED display or reed switches.

 

Q: Where can I get the user instructions?
A: The manual can be downloaded directly from the 7S module page.

 

Q: How is shipping handled?
A: All items are shipped from Finland with tracking and require a signature upon delivery. 

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Q: How do I place an order?
A: Contact us HERE and send in your watch (without strap/bracelet). Once received, we will install the 7S movement and return your watch ready to use. 

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Q: How do I pay for the order?
A: We issue a PayPal invoice only after the watch module has been successfully repaired or replaced. Our pricing is fixed and strictly follows the rates published on our website, ensuring full transparency and no unexpected costs. Prices on the web page include tracked return shipping for the repaired watch.

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Q: Where do you ship from?

A: We ship from Finland EU.

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Q: How do open the manual?

After payment, you will receive a password to access the relevant manual. Download the manual from the MODULES page, enter the provided password to open the PDF file.