I would doubt any "history", pertinent to your particular shotgun, could be found at this late date, unless some previous owner left some paperwork under the buttplate, etc.
FWIW, the model sounds like it is either a Model 60, or the gun that became the Model 60 - made up to WWII.
Pics would help...........................
"16", of course is the gauge, "70" is the length of the fired shotshell in mm's - which converts to 2-3/4".
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