This is G3806F copper green glaze. It is highly melt fluid at cone 6. As the glaze begins to melt notice that it splits on the sharp concave sections on the handle join. The underscore the needs for the melt to be sufficiently fluid to flow back in and heal these areas.
Ceramic glazes melt and flow according to their chemistry and mineralogy. Observing and measuring the nature and amount of flow is important in understanding them.