Austrian anonymous instruments

Remarkably small pocket drawing set with no indication of a maker. Difficult to date accurately, but probably early 19th century. It opens with a push button latch. The top of the leather covered case has tooled decorations around the edges and corners. The underside of the case is completely covered with elaborately tooled floral motifs with in the centre marked "No. 2½". The case measures 12x7x1.5 cm.