A member PM'ed me with an inquiry regarding an MS with which he was unfamiliar.
I am copying to this thread an edited and expanded version of my reply to him as it may prove useful to others who run across 'sporterized' military Mannlicher Schoenauers.
First, an edit of the query:
Brian I was in a Gun shop last week and came across what I thought was a Mannlicher Schoenauer 1903 but upon inspection it was stamped on the reciever Breda with what looked like a Swiss cross. It was chambered in 257 Roberts... I was wondering if you had any information about them? Thank you.
Edited, expanded, version of reply:
Disclaimer: This answer is based on the information provided, I haven't seen the firearm or images of it.
That said, an MS looking rifle with 'Breda' stamped on it at the factory is, indeed, a 1903 Mannlicher Schoenauer. It is not an M1903, rather it is a Y1903/14/27.
The Mannlicher Schoenauer was first publicly displayed at the Paris Worlds Fair of 1900 in fine sporting rifle trim. The actual purpose of the M1900, however, was an attempt to woo lucrative military contracts in competition with the Mauser 98 and other contenders. Prototypes in military form were shopped to ordnance departments as fine sporting versions found their way to the hands of influential parties. Some M1900 receivers also found their way to the finest of British gunmakers such as Westley Richards.
Greece eventually contracted for a 1903 revision, designated Y1903, which entered production in 1905 and was delivered in 1906. Revised again, great numbers of them saw service in WW1 as the Y1903/14.
Also during 1905, the Mannlicher Schoenauer sporting rifles and stutzen models of M1903 and M1905 entered production at Steyr. The M1903 used the same action, internal parts, and magazine as its Y1903 cousin and the same 6.5X54MS cartridge. M1905 was chambered for and had a specific magazine spool machined for the 9X56MS cartridge. The next few years would see introduction of the M1908 and M1910 chambered for the 8X56 and 9.5X57, respectively. Other than their model specific bores, chamberings, and magazines the M1903 through M1910 were identical. All were offered in half stocked rifle and full stocked stutzen (carbine) versions with various barrel lengths and single or double set triggers, as well as a nifty take down model.
The M1924 had a slightly longer magazine to accept the 'U.S. Cartridge of 1906', which was carried over to the 'M1925', or High Velocity rifle which was offered in a variety of chamberings. Production continued on a limited basis during Anschluss (Nazi occupation of Austria) and was halted by the end of WW2.
In1950, production resumed on a series of somewhat modified models which continued through 1972.
Now for Breda.
http://bredausa.com/about/#:~:text=...arms in,smaller and more manageable companies.
Breda is an Italian firm that was contracted to build (some say merely to assemble, some suspect only to 'drop ship') Y1903/14 rifles (Y1903/14/27) for further Greek contracts in order to circumvent export restrictions during the bizarre political climate of 1920s Europe. They are Mannlicher Schoenauers, just (allegedly) built in Italy rather than Austria.
For a very detailed chronology of the Y1903, Y1903/14, Y1903/14/27, Y1903/14/30... here's a video from Othais and Mae of C&Rsenal- you can skip to 47:06 to go straight to the Breda MS, but the entire presentation (as well as their others) is very well worth watching.:
All Y1903/14/27 (along with all 1900 and 1903 Mannlicher Schoenauers) were originally chambered for the 6.5X54 MS cartridge. Converting a 'Greek' Mannlicher (or any pre M1924 commercial MS) to another cartridge is a difficult and dicey process as the magazine spool, housing, and well are machined precisely to the profile of the proprietary MS cartridge that corresponds to the particular model. While collector value of a sporterized MS is considered by many to be virtually 'nil', values of unmolested original military MS are rising.
There's nothing like a pre WW2 Mannlicher Schoenauer, however, and the military models are internally identical to their civilian cousins. While it is empty, open the bolt, pull the trigger and gradually angle the muzzle downward. On a proper running MS the bolt will slide home and close completely with a satisfying 'snap' at about 30 degrees or so. Many Bredas and other military MS saw a lot of use, so check to see if any major corrosion is present. It's a big bonus if the seller has any spent casings that have been fired in the MS to check for proper headspace.
Some clues as to your MS origins are:
Reciever bridge stamping. The pre WW2 MS sporting rifles and stutzen were marked with model identity through the M1924:
M1900 - prototypes, sales samples, limited production. There were civilian and military M1900, along with custom sporters finished by 'bespoke' British gunmakers.
The other early model 'civvies' were marked as above, but with corresponding M1903, M1905, M1910, M1924 designation:
'Made In Austria' was added in mid 1924
The Sequoia.
The original M1924 was produced (some say 1000 units, others dispute figure) on a longer action and with longer magazine than the previous models in .30-'06 for the Sequoia Importing Company to be marketed in the United States. This was before A.F. Stoeger became sole U.S. agent for Steyr.
Many unsold Sequoias were rebarrelled and rechambered for various metric cartridges at Steyr to be sold in Europe:
This is a Steyr factory reconfigured M1924. Collectors often refer to these and the other MS produced between the M1924 and M1950 as 'M1925' models, though Steyr never used such designation. Stoeger called them 'High Velocity'.
'Made In Germany' indicates that this MS receiver was made during the 1938-45 'Anschluss', or Nazi occupation of Austria.
This marking, on left side rail, indicates a (civilian) MS sporting rifle or stutzen manufactured before mid 1926. The company name was changed th Steyr Werke AG in 1926, and commercial MS receivers produced afterward were so marked from then to the Anschluss.
The left rail of an 'Anschluss' MS sporting arm, which should also bear German final proofs.
Now for the military Mannlicher Schoenauer.
The front receiver bridge of military contract Mannlicher Schoenauers were marked with the Greek crest and model desognation of Y1903 or Y1903/14:
If marked thus, it's a 'Greek' MS - At left is the Greek Navy crest.
The left side rail markings indicate year of initial manufacture of contract renewal / revised versions:
Y1903
Y 1903/14
'Breda' Y1903/14/27
Y 1903/14/30 - these carbines were the last Greek contract Mannlicher Schoenaurs.
There were also some interesting prototypes, sales samples, and small trial runs of other military models, particularly in the pre WW1 years.
I may have omitted a detail or three, as I know more about pre WW2 MS sporting arms than I do of their military cousins. If I have made errors or significant omissions, please let me know though it will likely be too late to edit.