Rudall & Rose, who although in terms of 8 keyed flutes at any rate, produced a very recognisable style of flute over a period of almost 100 years, were also notable for undertaking to produce a very wide range of different flutes...if asked to do so.
Cabinet #2 was such an example, although perhaps, given that this was a very early example, it could be claimed that they hadn't developed their house style to the extent that they later achieved.
This flute though, is much later, and can be accurately dated, and although it has strong elements of the house style has also many idiosyncratic features.
This is Rudall & Rose #5631, address as stamped is:
38 SOUTHHAMPTON ST.
Which rather conveniently dates it to 1847-50