Age of Lortone arbor?

I purchased an older Lortone arbor and was curious about the approximate age. It looks like the current NS8 models except has a silver hammer-finish paint on it. I posted a photo of the label here:

[www.flickr.com]

I think it's a pretty generic label they used on a variety of equipment at the time as I've seen the same on tumblers. The 98107 is a zip code at an older Lortone address so not a model number as best as I can tell, so I assume it's post mid-1960's. Can anyone help narrow down the approximate age?

Thanks,

Jay

I apologize for the bad form in replying to my own post. I did get a helpful response from Jim at Lortone who suggests 35+ years of age. Maybe that will be helpful for the next person....