Astoria Straight Handle Portafilter Brand_SHURflo A reading near zero means

A reading near zero means the internal bladder has already failed

It has an unusual open face with no glass lens

This bearing spec turns up in unrelated equipment too

Dial: 63 mm body

Astoria Straight Handle Portafilter Brand_SHURflo A reading near zero meansAstoria Straight Handle Portafilter (Old Style) This old style Astoria straight handled portafilter combines the AS_73 handle and AS_79 body into one assembly. It does not include the spring, basket, or spout, and has 6. 1 mm thick ears. SPECIFICATIONS Ear thickness: 6. 1 mm COMPATIBILITY Fits: Older Astoria group heads; also some Brasilia, Bezzera, and pre 2012 Victoria Arduino Athena Leva models Note: the post 2012 Athena portafilter uses 5. 8 mm