Antique gold chain

Hello I’ve found this a few days ago when looking through my collection of suspected gold plated stuff, I’ve been looking through it as I had found a few bits years ago and finally cashed them in, so thought I would go back and look for anymore & I found this which looked so dirty I thought it was brass at first. Then had a closer look, once I started cleaning it I realised it looked like handmade gold Belcher. Think it’s a long guard. 3mm wide 44”.
Spent 2 days cleaning this and last pic is now after, the amount of dirt and verdigris makes me think this is Victorian for sure, 45”