Originally Posted by
mingocr83
I guess that this would be the last stretch on the fuselage design that has more than 30 years on the market...
30 years for the fuselage design ? More like 60. Boeing's 737 fuselage is that of the entire 707/727/737/757 range, first launched in the mid-1950s when Pan Am persuaded them to widen the proposed 707 fuselage to allow 6-across seating, and first delivered in 1958.
I wonder if any of the original tooling is still in use.