Type 26. This Tiger and Rose badge has no sweat holes so probably dates from after WW1.
This example has most likely been missed by quality control as part of the base metal wasn't correctly cut (in between the Tiger's front legs) when the badge was pressed in the die. The slider although tapering slightly, is narrow compared to other sliders.
It is also noticeable that the Rose is in white metal whereas normally the centre of the Rose would be made of gilding metal.