This is a P-37 web belt as issued to British, Canadian and Belgian soldiers. It is in used, good condition. It is faded, but there are no holes, tears or frayed spots. This is the later, olive green version.
There are no markings. I'm not an expert on the P-37 system and its variants and without markings I can't tell the country of origin on this belt. These belts were used like the U.S. pistol belt, but they were frequently worn by themselves when not on combat duty.