Michael's speedy response "Thank you for your email and links to the topic of your 1875 penny, with pictures, on predecimal's coin forum. The scan of the obverse shows that it is Obverse L with Reverse ja (small date). I would say that it is the same Obverse die that has been used with the example that produced the coin that I list in my book, page 69, as BP 1875 Cd; from the position of the dot. The reverse of your coin is ja (small date) where as the coin that I list as BP 1875 Ce is with reverse k (large date). The raised dot, to the right of the ship, on your coin does look to be in a similar position to that on the coin that I list as BP 1875 Ce. On your coin there appears to be a die crack from the rim to just below the raised dot and then does a 90 degree turn upwards to the raised dot. It is understandable that this obverse die (with the raised dot) could have been used on different days with the two different reverses but I regret that I don't have an explanation as to why or how it could have happened. It was just a bit of grit that first got trapped between die and the coin blank but it's a mystery as to how it could have been on the two different reverse dies ?? Sorry I could not have given you another answer. The best Michael " So still no answer to the conundrum David