[Edward Tinker]

Lots of folks worry about posting pictures or their name or their whatever. I work in the IT Security profession, sure, you can worry, but the internet can be as scary or as safe as YOU think it is.

This site is better than most, John D, the owner and manager of the site doesn't allow it to be searched by 'bots'. But from what I hear you saying, there is little to fear.
Even in restrictive states, like NJ, CA, MA, if something has been in the family for years, its fine. Unless its a Thompson and not registered (seriously, some were brought back). If you lived in NYC then it should have been registered, etc.
Without pictures we can help some. You said serial 16xxa - There were less than 12,000 Simsons made, even less S toggles (I am not fond of the term 'code' although its probably correct to a degree).

Everything depends on condition, originality and correct serial numbered parts.

So, at age 11 he picked up a luger from a departing german GI? Or he bought one later? I will read what you wrote again.

I keep a database, share only anonymous information, serial number, acceptance and proof marking on the right, matching mags, etc.

I would like all the info I can get, you can email me or PM me the info - by sharing we help everyone. If I get a partial serial number, I do NOT count it in my database.

One thing, to ensure it is a Simson frame, look at the stock lug, as if putting in a magazine, looking up at the rear bottom portion of the stock lug. Should be two eagle 6's. If no, then it isn't a Simson frame.