This 620 happens to be the version with the adjustable wide front.
The 620 was the successor to the Model 60 and the biggest visible difference between them was the new, two-tone, green and yellow paint job, even though the design of the sheet metal is still the same as the Model 60. The sheet metal was redesigned on the Model 630. The 620 is very similar in appearance to the 520 except that it is larger. Look HERE to see some other differences.
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