The .30-30 cartridge was/is a "necked" casing... meaning the bottle-shaped. Therefore, both of the .30-30 casings you found are damaged, missing the "necked" part of the casing. To learn about the .30-30 cartridge, and the several varieties of .30-caliber rifles it was used in, go here:
.30-30 Winchester - Wikipedia, the free encyclopedia
Time-dating:
Your casing's headstamp saying "Kynoch .30-30" was made by Kynoch Ltd. of Birmingham England. Because .30-30 cartridges didn't exist until 1895, yours cannot be older than that. Furthermore, the earliest ones were made in the USA, so your English--made ones date from a bit later. The headstamp on Kynoch rifle-casings from World War Two onward does not spell out the name Kynoch, instead saying the company's initial, a letter K. (I could not find information telling when Kynock stopped using the full name in the headstamp.) So, your .30-30 Kynoch casings were most probably made sometime in the first one-third of the 20th-Century.