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I have found no info on Type S1 ("Derrick Barge").
1) This is an error.
2) There is no info on the internet on Type S1 ("Derrick Barge")
3) S1 is some type of "YD" Yard Derrick?
4) ?
Any feedback on topic welcomed. Telecine Guy (talk) 04:36, 29 March 2017 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2017-03-29T04:36:00.000Z","author":"Telecineguy","type":"comment","level":1,"id":"c-Telecineguy-2017-03-29T04:36:00.000Z-Type_S1_(\"Derrick_Barge\")","replies":[],"displayName":"Telecine Guy"}}-->