I'm new to sewing leather. I want to start by recovering some leather seats. I found a Consew 206RB (no version number) with a table and clutch motor for $500.00. Someone cut off the Made in Japan part of the nameplate as you can see in the picture. I don't know if the RB was made any other place. It came with 4 cording feet, R&L zipper feet , the regular walking foot and 12 bobbins. I assume this machine is 30+ years old, but looks like it just came out of the box. No paint wear, no rust, very tight tolerances, turns easily by hand, but dry as a bone. So the first thing I did was lube every oil hole and everything that moved. But I don't see any requirement to lube the bobbin case, or procedure to do so. So do I, and how if so.