Need the instructions manual for Swiss ISA 8173 Quartz GMT, Invicta 6820

try this link below
https://cdn.invictawatch.com/www//manuals/invicta-instructionmanual.pdf

I believe this watch has a Ronda powertech 515 quartz movement, which requires a 371 (SR920SW) battery.

View the instruction manuals - Invicta

invictawatch.com/service/view-the-instruction-manuals

Enter your 4 or 5 digit model number to locate your watch. RECEIVE THE NEWSLETTER SOCIAL MEDIA · Terms & Conditions Customer Service Service ...Missing: 12983 ‎subdial

Setting Time Date Invicta Watch Chronograph - SmartBargains

https://www.smartbargains.com/.../Setting-Invicta-Chronograph.html

Know how to set time, day, and date in the Invicta Watch Chronograph. ... Invicta sells several different kinds of chronograph watches, with the two main ... and the Invicta Big Date and Day chronograph - the subdials that measure seconds and ...Missing: 12983

Invicta Reserve 48mm Octane Swiss Made Quartz ...

Nice watch check out some videos on YouTube on how to hey they work and u will learn new things....

The Invicta Atomic 4048 is "discontinued", and Invicta is not very helpful. They do NOT offer an instruction manual for the 4048, because it's discontinued. You can call Invicta at 800-327-7682 then you have to ask for "Melvin" who only works until 1PM eastern time. OR you can do the following:
Hold down the 8 0'clock button until it flashes, select 12hour or 24hour preference, use the button at 4 o'clock to select your time zone (GMT) The watch should reset itself to your GMT time.

You have to change the battery. Battery was fitted in factory, not at the point of sale, so, it can be a few years old. Rate me, plz.

Set it only at night but not between 8 and 2. Use the johnson rod that came with it.

http://www.invictawatch.com/support_files/instruction_manual/Manual-HiRes.pdf

You must set the Reference time first (page 18).