This is quite a rare early example of tennis racquet technology development apparently.
Called a Hazell's Streamline tennis racquet (or racket for our American friends) and made by Hazell's of London
this new design it was produced and patented around 1930 was quite a sensation in its day.
This particular one is the Blue Star model and was sold in Australia through
Murdochs Ltd, Park & George Sts, Sydney according to the decal.
This one has all its decals by the looks and is impressed Hazell's as well.
It also looks to have been re-strung at some point and perhaps re-lacquered
at the same time.
Priced fairly, taking the refurbishment into consideration