My folks house still had their origonal springs when we sold the house in 2000. It was built in 1955. But they did need adjustment thru the years. Theirs had an adjustment rod.

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past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'06 Lexus RX330
'93 Ford F-250
'96 Corvette
'99 Polaris 700 RMK sled
2011 Polaris Assault
'86 Yamaha TT350(good 'ol thumper)