It is 264.
Bas Dumoulin's birth name is Sebastianus Emile Dumoulin.
The 2 in 264 is worth 200.
250 for one in good shape
They are a fine rifle. H. Dumoulin rifles were made at Milmort Liege in Belgium. They are a high quality rifle, usually with quite sharp grip caps.The finer wood qualities boast a hand rubbed oil finish. I have owned many.
Whoever had the low bid that year. Most were imported from Belgium and the most likely makers would include, F. Dumoulin & Co., Simonis Janssen & Dumoulin, Henri Pieper, Robert et Cie, Neumann Freres ....
Marcel Dumoulin was born in 1905.
Sévère Dumoulin was born in 1829.
Sévère Dumoulin died in 1910.
Charles Dumoulin died in 1566.
Charles Dumoulin was born in 1500.
Franck Dumoulin was born in 1973.