Since you have stated ABSOLUTELY nothing about provinance... model, year... owners manual POLICE being a pretty decent watch from the UK (I'm going to skip right on past the AUTHENTIC notion... Chronograph (shown).
If your your watch is a REGULAR knock-off
(replicant)... t has the miyota movement...
A highly precise and reliable motor
in it's own right.
(sets very much like the high end valjoux cousins)
It is a crown-set... typically a three position stem set.
Force nothing... !!
Some GENTLY unscrew the crown... others will pull out
to set: 1, TIMW 2, DATE... THREE (back to normal -closed).
In the closed position
The stop/start butons do precisely that on those SUB-DIALS.
In the SET positions the start/reset buttons are used to ZERO those sub-dials (press & hold... then individual clicks will move each hand to zero).
Hope this helps!
police quartz movement Bing images