Swiss 30 X 173 early brass shell cases
- I have a few Swiss made 30X173 rimless brass shell cases manufactured in early 1950s. Only one of these shell cases has the original [fired] electric primer screw, the rest of them have no primers. The head diameter of these Swiss 30X173 brass shell cases is of 44mm [1.732-inch] and the electric primer screw has a diameter of 14mm [0.551-inch]. The case neck is very short, measuring only about 15mm [0.590-inch]. There are visible markings on the shell case heads from the ejector during the extraction process and also deep and long scratches on the side of the shell cases. ---> "dano1917" will post below my both pictures showing 2 of my Swiss 30X173 brass shell cases. => TOP PHOTO: Only the 30X173 shell case from left has the electric primer screw [which is fired]. The impressed headstamp markings are [going clockwise from the 2 o'clock position]: "Oe" (the monogram for "Oerlikon"), "A" (probably the code for the supplier of the raw brass material ?), "51" and "52" (the year of shell case manufacture - 1951 and 1952) and "D4" and "D5" (probably a lot number ?). Note that the electric primer screw has 3 holes for a special wrench. => BOTTOM PHOTO: Both my Swiss made 30X173 rimless brass shell cases can be seen very well with a dummy .50" Browning [12.7X99] round at right for scale. => QUESTION: Since my Swiss made 30X173 rimless shell cases are made of brass [not steel] very early in 1950s, does anyone know exactly for which type of 30mm gun [or weapon system] were manufactured ???? If I was wrong explaining the headstamp markings, please correct me. I hope Tony Williams can offer some good answer for this topic. Thanks in advance, Orita 07/15/09
- I have a few Swiss made 30X173 rimless brass shell cases manufactured in early 1950s. Only one of these shell cases has the original [fired] electric primer screw, the rest of them have no primers. The head diameter of these Swiss 30X173 brass shell cases is of 44mm [1.732-inch] and the electric primer screw has a diameter of 14mm [0.551-inch]. The case neck is very short, measuring only about 15mm [0.590-inch]. There are visible markings on the shell case heads from the ejector during the extraction process and also deep and long scratches on the side of the shell cases. ---> "dano1917" will post below my both pictures showing 2 of my Swiss 30X173 brass shell cases. => TOP PHOTO: Only the 30X173 shell case from left has the electric primer screw [which is fired]. The impressed headstamp markings are [going clockwise from the 2 o'clock position]: "Oe" (the monogram for "Oerlikon"), "A" (probably the code for the supplier of the raw brass material ?), "51" and "52" (the year of shell case manufacture - 1951 and 1952) and "D4" and "D5" (probably a lot number ?). Note that the electric primer screw has 3 holes for a special wrench. => BOTTOM PHOTO: Both my Swiss made 30X173 rimless brass shell cases can be seen very well with a dummy .50" Browning [12.7X99] round at right for scale. => QUESTION: Since my Swiss made 30X173 rimless shell cases are made of brass [not steel] very early in 1950s, does anyone know exactly for which type of 30mm gun [or weapon system] were manufactured ???? If I was wrong explaining the headstamp markings, please correct me. I hope Tony Williams can offer some good answer for this topic. Thanks in advance, Orita 07/15/09
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