Good morning this is my first time posting on this platform but hoping to gain a little knowledge. I've got what I believe to be a late 20s to early 30's Eibar shotgun I'm looking to source a barrel for and I'm having trouble verifying the original gauge. 12 gauge is too big so I would assume it's either a .410 bore or maybe a 28 gauge? Hoping somebody on here is well versed in these old Spanish guns, I've attached pictures of the makers marks and some measurements.
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[Linked Image from image2url.com]
[Linked Image from image2url.com]

Last edited by LibertyForge_USA; 11/04/25 10:42 AM.