Thailand Thai Baht 1 1955 1958 possible uncirculated paper money

Description

Thailand Thai Baht 1 1955 1958 possible uncirculated paper money.
This is a Thai Baht 1 bank note, but I'm not certain if it's from 1955 or 1958. In researching similar bills, I can't tell the difference between the ones I find from those years.
The bill itself has incredible color, it looks like it's glowing! The paper is perfectly crisp, no creasing, no marks, doesn't look like it's ever been used. When I hold it to the light, I see a watermark of a face in the white circle and also a vertical dark line in the center of the bill. Along that line is an indentation that almost looks like a band or something that held the bill in place was there. Beyond that indentation, I can't find any flaws.
I'm a baseball card collector, so I don't know the exact terminology or criteria for grading, but I've tried to describe as accurately as I see and feel and this is a beautiful item.
Please see my other currency items for sale, a number of Indonesian Rupiah at auction now. And check out my graded baseball cards, too! Thanks!