Sowerby pattern 1170 appears on page 2 of pattern book IX (1882). From registered design number 304363, registered on 16 October 1876 – Parcel 8.
I don’t think I have ever seen this colourway on a Sowerby piece, which appears to be white marvered on black or very dark blue glass before insertion into the mould - quite different from the normal malachite colours (where the colours run right through the piece). Normally seen in plain opaque vitro- porcelain.
Fred.