Identify type of hose bib

[lfoster (Linda J. Foster, TREC # 7654)]

Ran across a hose bib on 2006 home that I haven’t seen before. Could it be built-in anti-siphon type ?
Thanks,

[mboyett (Michael Boyett, TREC #7290 (Ret) Boerne, TX)]

Try this

[lfoster (Linda J. Foster, TREC # 7654)]

Thank you, Michael. I had looked but did not find,