NBR 224 and 420 Classes [SEP] service entry
What year was the service entry date for NBR 224 and 420 Classes? In what year did NBR 224 and 420 Classes enter service? What was the year NBR 224 and 420 Classes entered service? What year was NBR 224 and 420 Classes introduced? What was the year that NBR 224 and 420 Classes entered service? What year did NBR 224 and 420 Classes come into use? Which was the official year for the approval of NBR 224 and 420 Classes? What year is NBR 224 and 420 Classes associated with? What year was NBR 224 and 420 Classes commissioned?
1871
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Section::::Abstract.
NBR 224 and 420 Classes
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