Edward I Farthing?

I acquired this coin in 2015; it was attributed as a farthing of Edward I 1273-1307. Is there enough visible to confirm this attribution?

It weighs about 0.2 gram, and is about 11mm.

http://www.elfreeman2.com/w15/15w082r.jpg

http://www.elfreeman2.com/w15/15w082o.jpg

perhaps you can compare the details here:
https://www.dropbox.com/s/pfrffzg3tmimh1z/The_Silver_Coins_of_England_Hawkins.pdf?dl=0
The picture are not very good, but it is the only catalog I have

Thank you for your quick response. It appears that I have an Edward I, since it has an inner circle.

Establishing the mint might be rather difficult, since most of the legends are off the flan.

You have set quite a tough identification challenge with this one and in truth, we may never know for sure what your coin is because it has been so heavily clipped with virtually all the legend removed. We can see there is an inner beaded circle to both sides, which unfortunately does not narrow down the search that much since that is a common feature of silver hammered coinage from about the 13th century onwards. We can also see there is a long cross to the reverse with a trefoil of pellets in the angles, alternate angles with an additional annulet. Interestingly, the long cross reverse was introduced in the reign of Henry III (1216-72) because the previous short cross issues were becoming underweight due to the practice of 'clipping' but that does not appear to have stopped this coin from being so heavily cut as to remove nearly all identifying features. So where does that leave us? Weight and diameter? Well, instead of measuring what is left, we should perhaps be making a judgement as to what it would have been when it was whole by imagining a circle around the coin just touching the outer extremities of what is left, something like this:

Try doing that and see what you come up with. The same would be true for the weight. There has been so much of the coin that has been removed, it will obviously be severely underweight from what it would have been when it left the mint but by how much? That is quite hard to determine with any degree of accuracy but by using the same principal of the circle above, you may be able to make an estimate. Finally, the one identifying feature that remains is the portrait. Again, crowned facing busts were very common from around the 12th century onwards but I think this is going to be your best chance of finding any kind of match with a known image. You could try scrolling through the England catalogue here on Numista or you could try searching different rulers on the Classical Numismatic Group which is where I borrow many of the images for listings in the Numista catalogue. As I said, quite a challenge but I wish you luck and happy collecting

Thank you for your comments, and I do agree with your approach. I measured the largest diameter (using the small bit attached near 2 o'clock on the obverse, so got very close to the diameter of your circle.

Weight is a problem, since my scale has an accuracy of +/- 0.1 gram to begin with.

Yes, this one will be a challenge.

The two annulets puzzles me.
I found here some coins with those annulets:
https://en.numista.com/catalogue/pieces126366.html
and this comes very close I think:
https://en.numista.com/catalogue/pieces53979.html
If you turn the longcross picture 180° you can see that a lot of details looks similar
You will not find exactly the same coin, because hammered coins were struck by several dies
Scroll down here:
http://www.hallshammeredcoins.com/?page=coins&offset=33&type=99
(annulet issue)
and this:
http://www.leodishammeredcoins.co.uk/index.php?main_page=product_music_info&cPath=3&products_id=181

The Henry VI reverse is very similar and the crown and bust are about the closest match I could find when scrolling through the England catalogue.

Thank you very much for your input.