I would guess that the "PTA" is the name of the manufacturer that made the plastic bezel for Apple. I'm basing this on the fact that the T is somewhat taller than the P and A, looks like a logotype to me - maybe this company (
http://www.ptaplastics.com/page.php?id=500), they've been around since the 1950s, are based in the U.S., and list Apple as one of their customers.
On Tuesday, January 7, 2014 1:21:24 PM UTC-5, Tom Frikker wrote:
Hello,
Both of the Lisa 2 Bezels that I own right now (the third Lisa's on its way) both have "PTA Prototype" molded inside the front bezel. Does anyone know what this means, if anything?