Just to be safe, do not change either calendar function when the time is set between 11 pm and 4 am. Am not sure if Citizens suffer the same weakness as Seikos in their calendar works but why take a chance.
many thanks to all for your suggestions.after i posted the query on the forum i emailed orient japan with the query and lo and behold got the following reply by return:
"It seems to be our Orient Quartz model "Orientron Just" which produced in around 1979.
If so, about your question of the button at 2 o'clock position, you can reset and back the second hands at 12 o'clock position to adjust the current time
when you press that button".
so i guess that's the definitive answer and thanks orient for excellent service.
it seems the definitive answer was wrong!i just received an email from orient watch to apologise for the error and to confirm the button is for setting the hour hand to a different time zone without altering the seconds or minute hands.
pretty clever for the 70's eh?
Could you kindly list the numbers from the case back and the dial (usually near the 6). Even better would be a picture of the front and back. Extra credit given for a picture of the module. This may be useful for future reference of the same question. Also I am curious about the module used in this watch because usually the hour setting function is associated with highly accurate quartz.
I agreed with everybody that posted it was probably for advancing the day. I wouldn't have quessed the hour hand function. That is a very clever and it would be handy to just push the button and change the hour for daylight savings or time-zone crossings without having to stop the second hand or move the minute hand. Just another little feature, but something I could see being very useful.
as promised here are a couple of(sellers) pics of the nos orient quartz i recently posted a query about.
the numbers around the bottom of the dial are difficult to make out even with a loupe but look to me like:japan-x54911058-904.the case back has the ref:
the pics unfortunately don't show the black fluted dial to it's best.i wil get around to taking my own pics soon.
can anybody suggest what the logo above the six marker might mean?
it has a very slim case and all in all i'm very pleased with it and the timekeeping is spot on.