Don't ask the police for legal advice, it's almost as stupid as asking on the internet. Almost. If you want a real legal opinion go and ask a lawyer that understands firearms law.
It's not actually complicated at all. Laws are only paper until they get tested in court and then it will be at the whim of the judge to make an interpretation. In other words, THERE IS NO CONCRETE ANSWER to your question. Everything you have been told is clouded by opinion.
Please don't be the jerk that ruins it for those of us who are quite happy to use discretion and maintain the staus quo. If you can't figure it out and don't have the common sense to understand what Im trying to tell you, then please stay the hell away from antiques because we don't need irresponsible jackasses running around public places wearing a six-gun on each leg and proclaiming their legal right to do so. That's my opinion.
It's not really so complicated after all, is it?