While the company purports to be bringing it back, the returning sandwich has been "refreshed" and differs from the original with the addition of lettuce and mayo. Also, the original sandwich came on a sesame seed burger bun rather than a hoagie bun. The sandwich was discontinued back in 1974.
"Yumbo" appears to be a combination of "yum" and "jumbo."
The Yumbo Hot Ham & Cheese Sandwich carries a suggested price of $3.69 but is also included in Burger King's two for $5 menu whose current rotation also includes the Big King, Original Chicken Sandwich, and Big Fish Sandwich.
Nutritional Info - Burger King Yumbo Ham & Cheese Sandwich (196g)
Calories - 490 (from Fat - 210)
Fat - 24g (Saturated Fat - 8g)
Sodium - 1770mg
Carbs - 49g (Sugar - 10g)
Protein - 23g