yes it maybe a little off the topic russ but im too keen to learn as i own 2 of these type shells and its that look about them that prompted be to buy them.very hard to put into words what it is,deffo postwar repaint with litterally no paint or cork on top but extensive sand/texture around the lower end especially at the front seam rim area,would imagine the swivel bales may of been added at the same time,as these were fixed bale shells,crudely done with paint runs on the inside of the shell etc so field done i would strongly suggest.and these shells have not been tampered with in any way,as i know how the seller came about so many items.regards dave.