Yes, it's a JH 6d. I saw it for sale at the Midland Fair 20+ years ago. I would have passed over it as I already had an UNC 1887 6d, but even though it's a small coin, I could see there was something unusual about the date so I bought it.
Depends on the dates and denominations. For example, for the George V shilling, you have the following mixes:
1920-22 Silver 50%, Copper 40% and Nickel 10% (Some 1921 shillings contain a small amount of Manganese)
1922-27 Silver 50% and Copper 50%
1927-36 Silver 50%, Copper 40%, Nickel 5% and Zinc 5%
https://www.ebay.co.uk/itm/134155113006?hash=item1f3c44922e:g:bPEAAOSwVnpitcJr
"I need the money to pay for my carers,and nurses"
Honest reason for sale, at least.