Hello there ladies and gentlemen!
I'd like to suggest the following change on "Catalog" page:
Addition of Stock and Bond Certificates (Scripophily) as a sub-item inside Paper exonumia or even as a separated section (aka Scripophily).
Some References and Sources about Scripophily (Stock and Bond - i.e. gov. bonds, supranational bonds, municipal bond, war bond, corporate bonds, climate bonds, debentures, notes, &c. - certificates):
• Wikipedia: https://en.wikipedia.org/wiki/Scripophily
• IBSS International Bond & Share Society: http://www.scripophily.org
• About the Hobby of Collecting Old Stocks and Bonds: http://www.oldstocks.com/hobby.htm
• Scripozine: http://www.scripozine.com - Scripophily magazine (PDF, free of charge)
• Museo digitale della Scripofilia - Digital Museum of Scripophily: http://www.scripomuseum.com
• Professional Scripophily Traders Association: http://www.psta.com