Keep in mind any weight claims by a factory/brand is usually for their smallest unpainted frame with no metal hardware installed.
"Frame Weight: 49cm approx 740g±40g(52cm approx 820±40g)"
Meaning a size 55/56 probably weighs around 900±40g unpainted.
My VB-177 size Medium weighs just under 1000g painted. And it uses a BB86 pressfit rather than the horrendous finishing on that BSA threaded BB.