737-200 was just over 100 feet long
737-300 was just under 110' long
737-400 was just under 120' long
737-500 was 102 feet long
737-600 NG was 103' long (glass cockpit
737-700 NG was 112' long
737-800 NG was 130' long
737-900 NG was 140' long
The lost fuselages were 3rd generation, aka 600-900 series. Production for NG (Next Generation) was halted in 2019 as production shifted to the Max.
Earlier planes were shipped in front and rear fuselage sections on separate flat cars. 300 series through 900 series were shipped on a combination 89' flat car plus a trailing 60' flat car to accomodate the overhang. Early series had a custom container on the back end of the 60' cars to accomodate additional parts. These were later shifted to dedicated "containers" bring up the rear of the shipment. BTW, the cars were over standard width as the center cradle extended the width by about 2'-3'. The 737 shared the same fuselage width as the 727 and 707's that preceded them.
You could determine the series by counting the windows if you can find a high enough resolution photo of an entire not partially submerged unit. A scale 700 would be just under 30" long!
A graphic showing the sizes of the various versions, the tail, aka vertical stabilizer and the elevators do not extend that far behind the end of the fuselage.




