Yes, the photos worked. Unfortunately I'm still not sure what you have. From the book I have the serial number is to high for a 44 or 45. Are you sure on the caliber? Your best option at this point is to post the pics and your question over on the S&W forum. They have a sub forum for antique guns and likely will be able to help you.
http://smith-wessonforum.com/forum.php
Jim