Model MO-65 (Without Stand) These BESTO Meters were developed by our Engineers for frequently use by students and for other applications in electrical & electronic circuit, where a rugged low-cost instrument of moderate precision was needed. Specifications are same as Cat No. 301 but Accuracy ±2.5% of full scale deflection 'B' grade with anti-parallex mirror, but without desk stand. Common Ranges of ‘B’ grade Model MO-65 - Meters of Cat. No. 302 are listed below Type d) D.C. Ammeter D.C.