Mark 1 interior

The Mark 1 interior  has no stowage compartments, no drip rail, no inner gunwales (though these may have been added later), no stiffeners on top of the dagger board case, the thickened transom did not extend to deck level and there were knees from the side decks to side panels at the rowlocks and pads under the shroud blocks. This design was used on the first wooden boats, those  with sail numbers 1 to 729+ (number of the last Mk 1 is unknown).

Interior of Mirror dinghy number 3

Mark 1 Mirrors also had no bow rubbing strake as can be seen in this picture.

Mirror dinghy number 14 sailing at Wraysbury Lake SC Mirror Open in 2003