Harrods Mason's Ironstone vase age/info. Bought in England

5 inches tall, bought from a lady who I believe said her dad received it from his dad. Had a look on the Mason's pottery makers marks site -
https://janicepaull.com/xmark/marks.htm

But can't really find an exact match (looks like 12 to me but with the solid font of 11). I'd presume this makers mark could be a bit different as it was made for Harrods? and again I'd assume not as old as those dates as the old Harrods was 1849 to 1881 when it burnt down.

Main questions are
1) The date... Seen large variety in quoted dates for similar items on Google...& 2) what the item would have originally been sold as/used for, thanks guys! Any other info appreciated

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