Gold plate necklace chain lost | Reward!

I lost a gold (plate) necklace of great sentimental value somewhere between Stanmore Road and Music and Beans / South Harringay swim school on Thursday 31 March between 5.45pm and 7pm. It must have just broken and fallen off while walking. If anybody has found it, I will pay a £50 reward!

It's vintage gold plate rope chain style necklace, made of interlocking circles, and means a lot to me! It's not worth very much as it's only gold plate, but it is precious to me.