This is a genuine Invicta Reserve Sea Dragon watch model 21639 in it's original hard case.
I bought from the US and still has the original price tag I paid for it.
Just had a new battery replaced in it so all working fine.
No cracks or damage to glass just not using anymore.
Inside dials display second, minute, day and date is also displayed by the 4pm position.
It has a silicone strap and stainless steel face. 500m water resistance.