Looking for a od auxiliary. Also might me able to get my hands on a 6231b. Not finding much info on that either. Other than od might be .86. And found some info saying that a 6231c might be a .60 od. Is it possible to switch gears from the 6231c into a B.Watsons I have are about same size as a 5531/5831 brownies. The 43M has a .7 OD. The 5000 brownies with no letter or a vowel are the deeper od's(.7X). The B/C/D are .86. The 6000s are a little larger but the 6231 has a desirable .69 OD. No parts but I pick up whatever I can find just to have future parts. Mostly now Brown Lipe. What parts are you looking for?
That 5831 detail parts list was my submission also , don't know why half of pages are upside down ..