strange #3933163 intake

[Tommy]

This intake is aluminum and has the part number and firing order like all the rest of the "163" intakes I have found but this one has no Winters Foundry Snowflake and has not been polished that I can tell. It also has A very small raised area(not A stamp) near the firing order that says "zeus" or something close to that. Can anyone explain the missing snowflake and the casted in letters to me. I failed to look at the dates underneath but will have the intake in the garage in the next few days and can look more closely. Thanks

Tommy