Home / Kaolinovo USM - 2002 OOD Auto service Call · +359898659229 Vehicle inspection station (annual technical inspection / GTP). Permit No. 683. Region/municipality: Shumen / Kaolinovo. Categories: AB1 AP1 M1 M1G N1 N1G O1 O2. Source: Official RTA all-valid permits #683 (as of 2026-09-30).