Service a fake Portugieser Chronograph 41mm every 3 to 5 years, or when it runs more than 20 seconds fast or slow per day. Do not swim with it. Stop the chronograph before you press reset.
Fake Portugieser Chronograph 41mm Durability Guide
Daily wear
The case is 41 mm wide. The genuine watch has a sapphire crystal. A replica may use mineral glass or sapphire. Wipe the case and crystal with a microfiber cloth after wear. Keep perfume, sunscreen, and chlorine off the case. These agents attack gaskets and plated finishes.
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Check the crown and pushers for looseness. A crown that does not seat can let moisture in. Do not pull the crown while the watch is wet.
Winding and time setting
Most replicas of this model use an Asian 7750-type automatic movement. If the watch stops, wind it 20 to 30 turns by hand before you wear it. The rotor winds the mainspring during wear.
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Set the time with the crown in the outer position. This model has no date, so there is no date change window to avoid. Push the crown back in until it seats.
Chronograph operation
Press the top pusher to start the chronograph. Press it again to stop. Press the bottom pusher to reset to zero. Do not press reset while the chronograph runs. That can damage the reset hammer and the minute counter.
Do not leave the chronograph running for days. The extra gears wear. Do not use the pushers in water or with wet hands.
Water and heat
The genuine Portugieser Chronograph 41mm has a 3 bar water rating. That rating covers splashes and rain. It does not cover swimming or diving. A fake watch may have seals that do not match the rating. Treat the watch as not water resistant.
Remove the watch before a shower, a swim, or a sauna. Heat expands gaskets and can fog the crystal. If the crystal fogs, stop wearing the watch and take it to a watchmaker.
Strap care
Most examples come on a leather strap. Leather holds sweat and water. Dry the strap at room temperature, away from radiators and sun. Do not use soap. Replace the strap when it turns stiff or smells.
Timekeeping checks
Compare the watch to a time signal for 24 hours. Write down the gain or loss. A mechanical chronograph can drift. A rate of plus or minus 20 seconds a day is common for a replica. A rate that changes by 60 seconds in a day points to a problem.
Ask a watchmaker for a timegrapher report. The report lists rate, amplitude, and beat error. Low amplitude means the movement needs service. A beat error over 0.6 ms also points to service.
Service
Find a watchmaker who services the 7750 family. Ask for a full service: strip, clean, oil, new gaskets, and regulate. Ask for the old parts. Ask for a pressure test if the case has new gaskets. Parts for replica cases are not standard. Confirm part availability before you leave the watch.
Do not open the caseback at home. Dust and skin oil harm the movement. Do not blow on the movement.
Storage
Store the watch in a dry box. Keep it away from magnets, speakers, and tablets with magnetic cases. Wind the watch and run the chronograph for a few minutes each month. That moves the oil.