This is a premium Loctal 9pin socket (BG9) for mounting on Top side of chassis. It is not tin plated, it is silver. I usually only use gold, but these were not made with gold plating. The hole required 1-1/8" mounting screw centers are 1.5" ships from Texas USA I combine shipping across all items. See my other listings.
This is a premium Loctal 8 pin socket (BG8) for mounting on Bottom side of chassis. I just got these in and rushed to list them using pictures of the 9-pin version. These were supposed to be Top mount.