Inspect the casing for "browning" or heat stress marks.
While this exact code isn't a known official feature, similar-looking alphanumeric strings are often used for: hksva028v20
I should avoid making assumptions but offer helpful suggestions. Since "HK" and "SVA" might relate to certain industries, like HVAC systems, maybe that's a direction to explore. Inspect the casing for "browning" or heat stress marks