Roof hatches
This change from round to square hatches has had me thinking of whether there was an official cut-off, as per Service Notes or whether the cabs were grabbed off the pile and there was a period of either being used until round-hatch cabs had been used up. We know that trucks assembled a day apart could have engine numbers a considerable difference in sequential numbers.Thank you for sharing the information by the way, as well. It all goes down in my database.
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