DuncaninFrance wrote:Here is some info from a friend on another forum that I Moderate on which seems to answer the question.
Dutch 6.5x53.5 Mannlicher (Dutch, Romanian, Portuguese, ...) produced at Artillery Inrichtingen (Artillery Facilities - an Army Arsenal), Zaandam (Hembrug), The Netherlands.
35 12 0'Clock: year the brass was made
35 3 O'Clock: year the cartridge was loaded
O (letter) 6 O'Clock: brass maker, Artillerie Inrichtingen - Arty Facilities - in Zaandam (Hembrug)
38 9 O'Clock: Powder lot number
Any advance on this Martin

I think you have all the data that can be retrieved from the head stamp.
I could add that the case was developed by G.Roth in Vienna.
From 1896 G.Roth delivered parts like bullets, cases and primers to the Netherlands.
More specific they were sent to the cartridge factory in Delft where all components were put together.
Powder was delivered by the Dutch Powder Factory in Muiden.
In March 1897 the cartridge production was moved to Artillery Inrichtingen, Zaandam Netherlands still using the components delivered by G.Roth.
Because of the lack of qualified workers, Dutch cartridge production started in May 1898.
Some data on the first cartridges:
Cartridge length: 77.50mm
Case length: 53.60mm
Bullet length: 31.40mm
Bullet weight: 10.15 grams / 156 gn
Total cartridge weight: 22.00 grams / 338.36 gn
I could write a book on all the different powders, bullets, head stamps, clips and many different types of cartridges that were produced and used by the Dutch.
I wont do that for 2 reasons.
1) The book has already been written.
2) It would take me hours to type down all the info on this cartridge.
If you have a specific question Duncan, just let me know and I'll try to find the answer for you.

Dutch Steyr Mannlicher M95 with type 1 bayonet.
I have one question for you: Could you check the bottom of the clip please.
In most cases you will find a stamp of the manufacturer there.
Here's a picture of a box with 2 clips that I own.
Rifle ammo was packed per 2 clips in a cardboard box.
The Dutch name for this cartridge is: Scherpe patroon No. 1.
The letters AM on the box mean that in this cartridge American powder was used.
I own a Dutch Steyr Mannlicher M95 in this caliber, but do not use the military ammo.
It is too expensive and my experience is that most ammo was not stored very well and has gone bad over the years.
It either refuses to fire or it fires with a delay.
I reform .303 cases to 6.5mm Dutch.
It's a lot of extra work, but I see it as part of my hobby.
Here's a picture of the different stages from .303 to 6.5.
From left to right:
1) .303 British
2) .303 reformed to 6.5mm using a 6.5x53.5 RCBS die set
3) reformed .303 trimmed back to correct length (53.45mm) still to be fire formed
4) Original Dutch case from 1926
Problem with the original cases is that they can not be reloaded.
The primers that they used had a diameter of 5.00mm.
Nowadays the primers have a diameter of 5.50mm
Besides that they used a berdan case with only one flash hole.

.....only one flash hole....
I've used many different brands of .303 cases over the years and my experience is that the Dutch manufactured .303 cases are of the best quality.
Problem with these cases is that they use berdan primers with a diameter of 6.35 or 6.45mm.
I found a few, but they are not manufactured anymore.
To avoid all sort of problems I bought some Winchester boxer cases in .303.
They work fine.
I can use them 7 or 8 times and after that they start to show cracks in the neck area.
I don't mind though........The M95 is not a rifle that I take to the range every other week.

......cracks in the neck........
Met vriendelijke groet,
Martin