I have a gold marked pullet that looks exactly like yours. Mine was from a bcm roo over olive egger.
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Well it turns out they didn't get them from the breeder I thought they did so don't know where they got them from or what other breeds they breed. I contacted the breeder in my state and she said she didn't have a BCM Roo anymore so doesn't have chicks available but the farm I got mine from seems to have them just about every week. At first he thought she was an olive egger because he thought she had a pea comb but I sent them a closer pic proving it wasn't a pea comb. The egg waiting continues.
Not all olive egger crosses will have a pea comb. My money is on an Olive Egger cross. I have had several pullets that looked like that from that cross.