Finnish used German M/1909 rifle ammunition pouch manufactured by L. SCHALSCHA in 1916.
There were plenty of these pouches in Europe after WW1, and it so happens they fit the Finnish used Mosin Nagant 5 cartridge ammunition clips quite nicely. These pouches became the standard ammunition pouch of the Finnish army and stayed the most prominent one during and well after WW2.
This pouch is in good condition. There is some wear on the leather, but there are no holes or tears. The leather is also supple. Some of the stitching has period repairs and there is a reinforcing rivet on one of the lid straps.
There is an L. SCHALSCHA GERA-REUSS manufacturer stamp and 1916 year stamp on the back. There is also a Finnish Army property stamp SA on top of the center lid.
See photos for more details.