Just been looking at your photos. Could you take a close up of the hallmark on the base please, especially showing the style of letter ' i '. My reason for asking is that I am wondering if the age of the lid might be older than suggested. Whilst it is true that the letter ' i ' inside the lozenge shield shown in your pic denotes 1909 as its possible year, I would like to throw open a debate by suggesting the lid could be 1734 in date. My reference book from 1959, ( compiled by Frederick Bradbury FSA ) shows the style of letter ' i' corresponding as I said with date 1734. The letter style for '1909 ' i ' is different. If you liken the letter to actually looking more like our modern day letter g for want of a better explanation, the 1734 letter in my book, has a little tail extending beyond the top of the letter and 1909 does not. As I say it is my thoughts and am not saying that I am correct in my assumption. If I am wrong, is their a definitive chart that one should follow for shape letters?