Bidspirit auction | Marklin gauge I ? clockwork

Marklin gauge I ? clockwork 102 NBR steam locomotive - Marklin gauge I ? clockwork 102 NBR steam locomotive and tender. The locomotive and tender are both exceptionally nice, all original and comes with an original key. The track that this would operate on would be 42mm inside the flanges of the wheels. The scale is between Gauge 0 and Gauge I so I am uncertain as to what it truly is.