Based on case proportions, length/diameter, these appear to be .41 Long rimfire. You cannot base identification on overall length as maximum/minimum lengths for the short and long actually overlap. The long/short designation is strictly based on case length!
Per Suydam the .LOA for the .41 short ranges from .890" to 1.002" for the samples he had. The long LOA ranges from .962" to 1.140", again for the samples he measured.
Henry rifles were never chambered for either .41 cartridge but the .44 Henry. So all the two strikes probably mean is two separate attempts to fire were tried and just happened to be opposed by ca. 180 degrees. The "H" headstamp has always indicated Winchester manufacture, The letter commemorates B. Tyler Henry, who was Winchester's chief engineer and I believe foreman.
On a round item like a cartridge how can you determine that a mark on the rim is at 6 o'clock, 12 o'clock, or any other position?
