Sterling Concho & Chinese Peranakan Belts

Concho tested with 18k acid and only stamped “sterling”. May be some faint marks. 1940’s? Leather belt in very good condition. Measures 30-35.5 inches. Buckle is 2 3/4 x 1.5. Conchos are 2 1/4 x 2. Belt is .5 inch wide. One picture shows just the weight of the buckle. Not sure of age on other belt. Tested with XRF shows 69% silver. 36 inches. If you need a different size belt just take the Conchos off and put them on a new belt