Well, National's marketing-spiel for the RM1 claims it's based on a rare old instrument. These here wood-body Triolians, if that's really what I've got, are the only National mandos I've ever seen with a standard scale. I've seen only four of these or so. Mine has no shield decal or evidence of ever having one ... but it does have a serial number and the National cover plate with the patent dates.
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