My Kala KA-T was purchased at the local music store in April of 2011 and has a number 1012, which means it was manufactured in December of 2010. These Aquila strings are original and holding up fine.
What about my Ubass acoustic spruce top, fretless? It has a double stamp, one below the other.
One line says KA-UBASSFL, the the "FL" being a little offline compared to the rest, like it was stamped later. Guessing FL means fretless.
Below that is 1107, and staggered down a little and to the right is 1992. As if the 1992 were a subscript. Maybe it's a July 2011 build, and the 1992 means...??