Coil Pair Catalog Number?

I can't seem to find it anywhere in my Unitrade catalog. The closest I can come up with is #729a but I believe this is a horizontal pair?

I don't have my catalogues in front to verify but one thing to note is this has scoring lines which can be seen between the "imperf" area running horizontally

It is 729a if low fluorescent or 729ii if dull fluorescent.

Yes this is a coil pair, actually two coil pairs.
Older catalogues used to list these as unsevered pairs with score line because they are printed in columns of ten, then scored in between the columns. They were received at the post office in the form of what looked like a round stick. The clerk would grab the bottom part and snap off one roll from the other end for any customer who bought one roll of 100 stamps. If the customer bought two rolls together they sometimes would be able to unroll the two rolls together and your picture is what that would look like.
If you look carefully at the bottom right edge, you will notice a small notch. That is not a flaw. It is a normal production The slitter is a wheel with a notch that does not cut through the paper. These little notches were unsevered paper that held these two rows of stamps together.
With luck you could sometimes find an unsevered pair without score line. Those are worth much more than this pair.
Still a good find the way they are now.