That really sucks

Jerry. <img border="0" alt="[grrrrrrr]" title="" src="graemlins/cussing.gif" /> <img border="0" title="" alt="[Eek!]" src="eek.gif" />
You should edit your post and include the serial number of the Colt Navy as well (you do this by using the "edit post" icon with the pencil and paper at the top of your post).
The membership will be looking out for that serial number to come up on one of the auction sites.
Go to Auctionarms.com or Gunbroker.com and see if there are any similar Lugers or Colts for auction. When the hammer falls on the auction you can print out the auction ad pages and present them to your insurance company to substantiate the current value.
Unfortunately your gun was taken by someone who will probably just sell it to another thug... and not likely try to sell it nationally on an auction site... but who can tell.
You might alert the pawn shops in your area to be on the lookout too.
I hope that whoever did it gets caught with them before your guns are used in a violent crime...
tough luck guy... Thanks for letting us know... and hopefully someone here will see it and notify you...
regrets and regards,
John Sabato