Invicta watches are moderately priced timepieces owned by a Florida-based watch repair company. Invictas are assembled watches in which the company obtains watch components from various vendors and then assembles the watches in the United States, China or another country. Invictas offer an extensive line of dive watches. Virtually all of Invicta's entire inventory is battery-powered quartz watches, although the company does manufacture some mechanical automatic timepieces. Repairing the electronic or mechanical mechanism of an Invicta is not recommended for novices. A professional watchmaker should perform the repairs. However, replacing batteries and removing scratches are easy tasks.
Flip the Invicta watch face down and inspect the caseback. Contemporary Invictas have two types of casebacks. One caseback is fastened by four screws. The other caseback has six slotted indentations and screws directly into the case much like a jar top.
Use a watchmaker's precision screwdriver to remove up the four screws that fasten the Invicta caseback to the watch. Insert the screwdriver and rotate the screws counterclockwise until each screw is removed. Insert a watchmaker's slotted tool into the six indentations in the caseback if the Invicta is a screw-down model. Rotate the tool counterclockwise until the caseback is free.
Remove the caseback from the case. Remove the rubber seal from the case.
Use a pair of tweezers to remove the small silver-coloured battery from its holder. A screwdriver can be used to pop the battery out of the holder if tweezers are not available. Wear surgical gloves so body oils and dirt do not contaminate the watch's electronic mechanism.
Use the tweezers to insert the new battery into the holder. Ensure that it's snug. Replace the rubber case seal with a new one. Place it on the rim of the case.
Place the caseback on the case rim. Insert the screws into the case and hand tighten. Use the screwdriver to evenly tighten the screws. Start by tightening one screw, then go the opposite end of the case and tighten that screw. Then return to the other end and so on until the case is tightened in an even manner. If the caseback is slotted, simply use the slotted tool to tighten the case clockwise until snug.
Pull out the crown, which is the winding knob on the case edge, at the 3 o'clock position and set the time. Push the crown flush against the case. Your watch is working.
Mask the watchcase with masking tape, leaving the sapphire crystal exposed. Place a small amount of 5.0 grade diamond paste on the crystal, which is the glass covering the dial.
Rub with a small cloth the paste onto the crystal for up to 10 minutes. Decrease the abrasive grade with a 3.5 paste after the first application and apply for five minutes. Then use a 1.0 or .5 abrasive grade for five minutes or until scratches are gone and the sapphire crystal is polished.
Wipe away excess paste and polish with a cloth.
Always replace the case seal on an Invicta dive watch.
Never open a caseback unless it's necessary. Novices should consider having a watchmaker perform the task.