ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
TII Group’s[3] own "an invention turns 40" retrospective names 1983 as the year Scheuerle developed and launched the SPMT, but gives no specific day.German heavy-vehicle maker Scheuerle Fahrzeugfabrik developed and launched the Self-Propelled Modular Transporter (SPMT), the modular, multi-axle hauler that became the industry standard for moving exceptionally heavy loads. Its name is now used generically across the heavy-transport industry.
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