From what I have found on the net, there seems to be a question if there was ever a Thick lettering (obverse E) from Bombay- the source I found says it is unconfirmed. Well, I suppose this shows there was a thick, but thin (obverse F) repunched over it. Has anyone seen this before, and could you tell me how rare it is and approx. value? Oh, by the way, all the letters on the front are repunched- the IIII is noticeably repunched, however KING is not so noticeable- if anyone wants I can upload photos of those letters. Also, the reverse is a type 1 as would be expected from Bombay.
Looks like common mechanical doubling rather than anything else. I don't think there is anything significant here, sorry.
http://baldwin.co.uk/coins-of-india/WilliamIV/CatWilliamIV_Rupee.htm, and http://www.worldofcoins.eu/forum/index.php?topic=21065.0 It's easy to assume it is mechanical doubling, but permit me to make a few points: The letter M would have doubling of the serif if it were mech doubling, it doesn't. The shadows of the L's are dead ringers for the thick variety. Also, have you ever seen mechanical doubling with that sharp of an edge- I mean look at the first L especially. There is no doubling of the bust...All the letters are doubled- IN A CIRCLE with all the shadows of the letters to the letter's right as you rotate the coin...on a coin with a known Thick and Thin variety...and it's now magically less easy to brush it off as mechanical doubling. Now, let's say it is what I think it is. What would you speculate as to value?
That fourth one is a doosey, mechanical doubling both directions- to the right of the I and to the left of the comma!?!!