This is a brand new genuine Casio watch strap original equipment on the following models (model number can be found on the case back of your watch) :
W-86-1V
W-86-1VQ
W-86-1VUZ
W-86-1VZ
W-86-4VZ

Black with a black CASIO branded buckle.
19mm 
We are authorised stockists of Casio watch parts in the UK and this strap will be supplied in official CASIO packaging.

Delivery is FREE in the UK and we post FAST

Please see our small family business positive feedback and buy with confidence!