Thank Bj.
I clamp it against to the router table since I need the height for routing 48 inch long. I either use vertical clamping or horizontal. Since it’s 28” long and has 25 slots, it still leaves room on each side for vertical clamping.
Unfortunately there is no stamp/part number on it. I looked just in case.
But,I think that Amazon might have the pictures mixed up or using the same picture for both templates.
This is the link for 7123 the 28.5 inch template which is same size as mine and it’s for ½” box joint and yet there are only 17 slots which it does not make sense .
I would call the PC support and not Amazon to confirm!! The one you posted is 5123.
http://www.amazon.com/Porter-Cable-7...1?ie=UTF8&s=hi
If that’s not it, it could be one of those things PC made a few and then decided that no one will use the full length or something. Just guessing.As I said it is from back in early 90’s.
meanwhile, here's the first jig I ever made back in 91.