Most of the 10 GA Very Gun cartridges I have seen have been the Mark II variety. Often they are packed in 10 round cans (similar to what nuts are sold in, but with the old fashioned twist key to peel off a sealing strip.) SOme have been packed in cardboard 10 round boxes and then wax coated.
There is a great variation in makers, headstamps, use of high or low brass cases. Usually the color of the cardboard case corresponds to the color of the signal, but not always. The closing wad is usually marked with some or all of this: “VERY MK II [color]”. However they do seem to be consistent in having a roll type crimp to seal the mouth, and all use the tactile (touch or feel) coding on the closing wad:
GREEN- smooth surface (“smooth as green grass”);
RED- Raised ridges usually 3 but sometimes one or two running the width of the closing wad (“Rough Ridges- red”)
WHITE- a single raised bump or teat.
Recently I saw some Very signals which have similar tactile features on the wads, but the cases are left straight with no rolled crimp, and the closing wads are at least 1/2" below the mouth of the case. The high brass has REMINGTON UMC embossed around the brass just back from the front. Both the red and green signals have red cases. (No white ones to compare).
I am wondering if the latter style without any roll crimp are Very Signals Mark I?