The plain one is two years old, the spiked is one year old. These were made from pre-cut, pre-dyed, unsealed leather. The edges weren't rounded, the insides were neither dyed nor sealed, and my rivet/spike/adjustment hole placements are all off.

They still look decent, considering they were my first tries. *chuckles*

My boyfriend and partner in making things, W.K., helped me with these. He cut and dyed the leather and taught me the basics of collarmaking.