Here is the silver one. It hasn't been cleaned either. It has a plain back with no design. It is curved on the outside and I think it's hollow inside. It's about 1.5 cm wide.

Any hallmarks ?

No sorry. I meant to say that and forgot. So I don't expect it would be worth much. I haven't had time to start researching it yet, Just posted the photos as people were asking. 🙂

Here are some of her other things. 

Oh that's a shame. I was imagining I could see a mark and some writing on the right hand inside half of the bangle in the 2nd pic, but it must just be my eyes.

Actually, siddie, you are right. there is a hallmark. It says 'Sterling' and has a B in a hexagon. Research suggests that its for Burkhardt/the Canadian retailer Birks. Birks is still around and sells mostly upscale merchandise. 

Apologies for missing it before. You must have good eyesight siddie! Obviously much better than mine, but then again that wouldn't be hard! 😁

I took some photos then zoomed in on my phone:

OK so as you would imagine this does make a difference! The next thing is to weigh the bangle in grams - from other listings I can see that there can be a considerable difference in the weights of various bangles, which obviously makes a difference to the value.  It looks to me as though it is half engraved, and with what seems to be the typical Birks decoration, which others date to the 1950s. Also the width of the bangle. Is it is very good condition with no dents? I would clean it GENTLY especially on the inside where it looks quite tarnished. I assume it catches securely. The prices the one eBay seller got sees to me to be very high - and it was in Dec,  so maybe a present. However there is no harm in asking.

Thanks, siddie, so it weighs 26 g and yes it does have a dent. I only found it today and was terrified that I'd somehow done it, but when I look back at the earlier photos I took it was already there. 

I'm really anxious about trying to clean it. I do have an old silver cloth so might try that. 

I also realised that the earlier photos I took aren't vey good; they make it look too dark, so I'm trying to find some better light to take better photos. I'll post them here when I do it. Might not be tomorrow as we have a fairly busy day. 

I've researched today and have lots of bookmarks saved (haha). 

Also, the Burkhardt / Birks / Canadian connection sound right as that's where she came from. 

Thanks again for trying to help. I really appreciate.  🙂