Good shot of the anti-siphon valve. The vehicles that require this type filter must be very sensitive to and affected by a dry start condition. Normally just a relatively brief rattle if adbv compromised, generally speaking hardly a death knell for the engine.
As for it being Champ Labs made, no reason for me to believe otherwise. The compression spring is a classic Champ design, which in thier lower/lowest tier filters serves additional function of bypass, clicker type.
Since January 2017 UCI Holdings, Champion Labs parent owned by a management triumvirate of Blackrock, Credit Suisse and JP Morgan.