I would certainly defer to your belief Charles as I'm sure you are far more versed than myself In handling and inspecting vintage items. I just had a gut feeling but I've been wrong many more times than I've been right!Thanks for the reply, Ton. I still see nothing at all inconsistent with the lining, and the thread the "pony" label is sewn with is a perfect match to that which assembled the jacket, unlike the thread on the Californian label. Labels would be attached as either part of the overall assembly using the same thread or they would be the work of a finisher who could be on a machine using totally different thread, but as I noted already, this label has been hand sewn in a way so as to attempt to duplicate machine sewing using different thread from the jacket's assembly thread and the thread used on the "pony" label and this is not how factory work was done.
I've seen better attempts at fraud on higher-dollar items, where the labels were first sewn on a machine apart from the cap or jacket, etc. to create a border of stitching that will appear to be the original factory machine sewing, then the label was glued to the item. This type of fraudulent label attachment is more sophisticated and usually is reserved for goods of high value, though matching the thread is still a problem, especially under magnification, and the labels rarely will sit correctly because they aren't sewn down, though they can be very convincing to a fast glance and/or an untrained eye.
Seeing in person is everything, of course, but as a natural sceptic and wary detective for anything remotely out of place due to my early roots in collecting Third Reich artifacts, where one missed detail can cost you or someone else thousands of dollars, I only find this Californian label to have a stink about it.
I also agree that the addition of the phony label is totally superfluous. The jacket in and of itself is quite a piece. It's a bit like putting a cherry on top of the cherry on top. It just doesn't make any sense and it's totally unnecessary.