The models are identical because D'Agostini was the parent company for Atlas (UK), Altaya(France etc.), Kriegsschiffe (Germany etc.) and there was a Japanese Division (Japan, Australia and USA), to name but a few. In the case of ship models, most were made to 1/1250 scale but models for the Japanese were made to 1/1000 or 1/1100 scale. The biggest changes were between production runs of the same ship or of ships from the same class. It is best to ask about individeal ships.

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the ones i have are about the same, build style and accuracy

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Which models are generally more accurate, (esp. naval vessels) those from DeAgostini or Atlas, or are they basically the same quality?
Thanks.