Sterling silver Brutalist Modernist pendant for necklace. 70s retro jewellery hallmarked 'London 1976'. Textured criss-cross openwork, MCM

A beautiful retro pendant for a necklace.
The pendant is sterling silver and is hallmarked on the reverse (hard to make see) with a lion's head (sterling silver), a lion (London) and B (1976).
There is also a maker's stamp which I can't make out, but it's something like BEC. All very tiny!

It's Brutalist in style - random aggressive ridges/shapes/holes in a criss-cross pattern forming a very rough oval shape. Some smoother branch or claw like uppers with heavy bark textured dips... Please study photos, hard to explain!

No chain.
Quite a statement, quite possibly unique. Perfect gift idea!
50x33mm. Weighs 15g.

Price includes P&P.