Help With Watermark Identification - Great Britain - King George V - Ten Pence

So I have the attached stamp - 6 of them - and am looking for some help with watermark ID.





I know the below image of the watermarks is not the best, but im new to Photo Shop... Trying. I also have individual iPhone pics if it will help.....






From the top row, left , I think the 1st and 2nd are Wmk 103 - Multiple Cypher.

The 3rd and 4th I think are Wmk 111 - Block Cypher OR 111a - not sure.

The second to last - no idea and the last one I think is W100 - Simple Cypher.

Thoughts? Im happy to also post the images as individual images. Thank you.

No issues there, all but the last one are "Block Cypher." The last one is "Royal Cypher" (aka "Simple Cypher."). No other watermarks exist. There, however, are slight variations in the watermark that are only mentioned,

And with "slight variations," I mean that the experimental "Block Cypher" watermark does not exist for this stamp (only 1d and 1½d), "Multiple Cypher" only exists for the ½d and 1d and is similar to the "Royal Cypher."

Thank you for the quick reply and help. Disappointed on my beginning attempt!! Need more to practice with. Appreciated.