Is there a number on the other side? Scrape away the grease and paint.

I have a nsw police number on one of my engines. Took the car in for rego, inspector couldn't find the engine number so I got refered to the police. There had been issues with the number years before so the police did their checks, couldn't find the number and issued me a police number. Took it to get stamped and the other mechanic wiped the dirt off and found the original number.