: Burger King selling 37-cent Whoppers through Saturday

Chew on this: fast-food giant Burger King is lowering the price of its signature Whopper sandwich to roughly the cost of a gumball.

The Restaurant Brands International-owned QSR, +0.68% burger chain is temporarily flipping its Whopper prices back to 37 cents on Friday and Saturday (Dec. 3 and Dec. 4) to honor of the 64th anniversary of the sandwich’s debut on the menu. The deep discount marks the 1957 price of the flame-broiled burger traditionally topped with lettuce, tomatoes, mayo, ketchup, pickles and onions, which normally costs around $4 today.

“In 1957, Burger King changed the game with the introduction of the Whopper sandwich — an iconic, flame-grilled burger prepared your way (with 1,024 potential combinations, to be exact),” Burger King North America head of marketing communications Zahra Nurani wrote in a statement. “And now, 64 years later, we’re excited to celebrate our beloved burger by offering The Whopper for its original price of 37 cents exclusively to Royal Perks members.”

The throwback deal is only available to Burger King’s Royal Perks members, however, and must be ordered online or on BK’s app.

Rival burger chain McDonald’s MCD, +0.02% recently ran a similar promotion, dishing Egg McMuffins for just 63 cents (rolled back from its modern-day $3.99 price) in November to mark the breakfast sandwich’s 50th birthday. Customers also had to order the marked-down McMuffins through the McDonald’s app in order to take advantage of the deal.

Burger King’s Royal Perks program is a service that allows customers to gathering points through purchases in order to redeem for menu items. Other chains like McDonald’s, Chipotle CMG, -0.92% and Starbucks SBUX, -0.56% offer similar programs.

Burger King recently partnered with Robinhood Inc. HOOD, -9.96% to give members of its Royal Perks programs a chance to earn cryptocurrency through qualified purchases. Customers could earn bitcoin BTCUSD, -3.59%, ethereum ETHUSD, -4.83% or dogecoin DOGEUSD, -4.24% by spending $5 on the Burger King’s app.

Shares of Restaurant Brands International QSR, +0.68% are down about 7% so far this year, compared to a 7.97% gain for the S&P 500 SPX, -1.34% over the same period.