Seiko Criteria Limited Edition SNA299P1 Pilot's Watch with Slide Ruler

Limited Edition 508/600

From the box this limited edition seems to be available in Malaysia, Hong Kong and Singapore only. I had seen them in June 2003 and was fascinated with the internal slide ruler. I only discovered it was transparent after I bought it, what a nice surprise. The coating is most likely PVD, so one has to be very careful not to scratch it.
The biggest surprise was the Alarm chime. For a metal cased SEIKO 7T62 very loud and surprise, a different alarm sound. This one is almost audible Seriously, it is a lot louder then the one in the many 7T32 that are in my collection and it seems the higher pitch makes it a lot more audible.