My brother tested all of the oil caps if they had any issues he just tossed them. Please see the pictures of the brand and values.    IF YOU WANT TO COMBINE SHIPPING PLEASE LET ME KNOW BEFORE BUYING SO I CAN FIGURE OUT EXACT SHIPPING BEFORE THE PURCHASE PLEASE. DOING A PARTIAL REFUND IS MAKING MY BOOK KEEPING VERY HARD. THANK YOU.  My brother was Doug Howerton of Howertone guitar and amp repair. He built many tube amplifiers mic pre`s and guitar pedals for recording studios and touring bands. His plan for retirement was to stop repairs and just build so he accumulated tons of transformers, tubes, transistors, wire from the 30's 40's and 50's and much much more. I will be liquidating all of it here on ebay this is just the start of 100's of 1000's of auctions I will be listing. There are also a lot of dated items that I have to keep vintage items vintage. He kept just about everything and I mean everything. I have tubs of just old screws he kept from amps, organs, radios, ect. So keep me in your favorites and look often.