That is the EPA tag and not an engine model number the Briggs model number will be in the format at xxxxxx-xxxx-xx and on Vanguard engines is typically a riveted tag close to the oil filter. But I have seen some of them stamped into one of the valve covers.
OK ... I must be blind ... I checked the top (and bottom) of both valve covers ... nothing.
Looked at the side of the block ... nothing.
Where do I look for the #'s ???
On a high note ...the starter had a tag on it! So I know what I need.
I still would like to find the engine #. I keep things running forever (my truck is 37 years old .. more fiberglass than metal .. and my weed trimmer is now 38 years old) and am sure I will need parts in time.