Might still work
Deal likelihood of working: Medium
Smithsonian promo code: "Offer ends 11:59 PM (EDT), Friday, March 17, 2017 * * Promotion code PATRICK must be applied in your shopping cart to take advantage of your free standard shipping offer. Some items have additional shipping charges, and these additional shipping charges still apply. Offer is not valid on orders with express delivery, previous orders, and orders being shipped to Canada and internationally. Available online only at SmithsonianStore.com. Offer not available on Smithsonian LogoWear."