Isle of Man: 10 pence 1992, km337, die marks AA versus AB+AC

https://en.numista.com/catalogue/pieces9618.html

Mr. Paul Baker brought this variant to my knowledge. I checked it up as well and then made the documentation. I could only relate the 1992 coins, since I couldn't find images of any of the other years and die marks of this type (km337).



I'll make the CR now

My 1993 AA has a PM.

Citação: "bjherbison"​My 1993 AA has a PM.

​Thanks so very much, but the question is about the nines in the date, pointed or rounded?

I apologise for the slightly blurry and dark photos here (overcast at the moment hopefully some better ones in the future) But here is my 1992 IOM 10p with the pointy 9s in 1992.

Thanks so much, but the 1992 is already covered fully in the documentation.

Citação: "Sjoelund"​Thanks so much, but the 1992 is already covered fully in the documentation.

Your welcome,

​It’s just to compare the images more closely to see if there is any other variation but as far as I know there isn’t on mine or if there is other more subtle variations on mine or the ones in the CR that we haven’t noticed yet (as far as I know).

​My 10 Pence 1993 AA is has straight 9s.

Only considering coins for circulations, the style of digits with curved 6s and 9s is used for:
- Everything up to 1989.
- 10 Pence 1992 AA (no PM).
- 20 Pence coins from 1998 to 2016.
(The crown coinage year styles have much more variation.)

I added a description and image to all of the types issued over the 1989/1990 change, but my edit for 1 Penny KM# 207 was rejected. My text and image can be seen in 2 Pence KM# 208: https://en.numista.com/catalogue/pieces7339.html and other pages.

There are other variations in the straight 9s -- many are open (or have narrow connection from the loop to the stem) and others are solidly closed. In my collection I have the following closed 9s from 1990 to 1993:

5 Pence KM# 209.2 1990 AA
5 Pounds KM# 215 1990 AA
(I don't have any open 9s for those year/letter combinations, which doesn't mean they don't exist. And it's not all 1990 AA: I have 1 Pence 1990 AA with open 9s and 50 Pence 1990 AA either open or with a very narrow connection to the stem.)

I'm missing many year/die letter combinations so there might be more closed 9s from 1990-1993.

From 1994 on I'm not aware of any open 9s.

For the circulation coins I have, IoM coins used "1" for the digit one in dates up to 1984, "I" from 1985 to 1993, and "1" again from 1994 on. You might want to add that information when you edit KM# 337. (I'm still researching the 1/I/1 transitions, but I haven't found any counter-examples yet.)

Citação: "bjherbison"​​My 10 Pence 1993 AA is has straight 9s.
​
​Only considering coins for circulations, the style of digits with curved 6s and 9s is used for:
​- Everything up to 1989.
​- 10 Pence 1992 AA (no PM).
​- 20 Pence coins from 1998 to 2016.
​(The crown coinage year styles have much more variation.)
​
​I added a description and image to all of the types issued over the 1989/1990 change, but my edit for 1 Penny KM# 207 was rejected. My text and image can be seen in 2 Pence KM# 208: https://en.numista.com/catalogue/pieces7339.html and other pages.
​
​There are other variations in the straight 9s -- many are open (or have narrow connection from the loop to the stem) and others are solidly closed. In my collection I have the following closed 9s from 1990 to 1993:
​
​5 Pence KM# 209.2 1990 AA
​5 Pounds KM# 215 1990 AA
​(I don't have any open 9s for those year/letter combinations, which doesn't mean they don't exist. And it's not all 1990 AA: I have 1 Pence 1990 AA with open 9s and 50 Pence 1990 AA either open or with a very narrow connection to the stem.)
​
​I'm missing many year/die letter combinations so there might be more closed 9s from 1990-1993.
​
​From 1994 on I'm not aware of any open 9s.
​
​For the circulation coins I have, IoM coins used "1" for the digit one in dates up to 1984, "I" from 1985 to 1993, and "1" again from 1994 on. You might want to add that information when you edit KM# 337. (I'm still researching the 1/I/1 transitions, but I haven't found any counter-examples yet.)

​Thanks for this detailed contribution.... I'll have to look through my collection for the open and closed 9 and eventual 6, since I didn't even look for that before!

I have researched Internet for the non 1992 10 pence coins, and only found the pointed/straight 9's.

Do you happen to have any images of the 9's, open and closed, for the same year and die?

I'll have a look at mine later in the day.

Take care

my 1990AA closed 9
my 1993AA open 9

Closed 9?

Open 9?


Do I have the closed and open correct?

So I've revised my 5 pence coins and found this:


AA

AB

AA

AB

AA

AA


It looks like the 1993 is between open and closed?

Take care

I don't have any images prepared. I'll check, but the images you have seem to represent the range I have.

There must be a good formal term, but in my mind the main distinction is whether the end of the loop ends in a point or solidly connects to the vertical stroke. Whether the point actually touches or just ends near I think would often be an unintentional difference or possibly an effect of die wear or polishing.

But the 1993 image you have does also show some stylistic differences from the 1991 and 1992 so maybe a third category would be useful.

OK, I just checked my three 1991 AB 5 Pence examples. The dates have the same shape of 9's as your 1991 AB image. (But my three have the "AB" in different positions -- minor position and tilt changes but clearly different dies.)

I have 2 of the rarest isle of Man Trial 10p one of which seems to be the only one that ended up circulating