I have a couple old boot poker chips. Would collectors consider these just slight variations of the same code/design? The base shape of the boot seems pretty close, as though the same mask or template was use. The detail work is different on each one. The position of the spur, the size of the pull strap and the position of the lower horizontal seam. Even though all three chips are somewhat different, the front and back of each chip is very,very close on these details. any input welcome.