Lot of 50mm Telescope eyepiece Lenses, unknown type For Sale

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Lot of 50mm Telescope eyepiece Lenses, unknown type :
$300
This auction is for a lot of what I believe are telescope eye-pieces. The last on the right is a hollow aluminum (extension?) tube. I know almost nothing about these so I will describe them the best I can. All measurements are approximate. Starting left to right:-No visible markings, 60mm wide on one end and 50mm wide on the other with a total length of 115mm. This one is the largest (longest) of the group.-Next is marked "BRANDON 48MM VERNONSCOPE USA" Total length is approx 75mm. 50mm size-Next is marked "ER 32MM" Similar to the one above but total length is 57mm. 50mm sizeAll of these first three are 50mm in diameter on the end which (I suspect) goes into the telescope.-Fourth from the left is an eyepiece with "UNIVERSITY KONIG 32mm multicoated" embossed on one end. The business end of this one is indeed 32mm.-Last on the right is what appears to be an extension tube, one end will accept any of the first three lenses and the other end is 50mm. Total length of this tube is 60mm (approximate). No glass in this tube. Operational tightening screw.Also included are an assortment of colored filters. Three are 50mm size, Red Green and Blue. Several gel filters mounted in 35mm slides and three lens caps.I bought these at an estate sale and I have no idea how to use them. I have included in this listing all of the information I have. Please don't ask questions that I have no idea how to answer.These lenses are in good condition and appear well cared for. No fungus fogging or scratches on the glass is present in any of them. Minor dust.Shipping is USPS Priority Mail 2-4 business days to the continental US. All international buyers must contact the seller before bidding.
On Jul-25-10 at 09:11:08 PDT, seller added the following information:
Shipping update: Shipping cost to the UK would be $47 USD. Shipping to Canada via Canada Post is at no additional cost to the buyer. International buyers are welcome but once again, please contact the seller before bidding if you are outside the United States or Canada.
On Jul-26-10 at 10:32:49 PDT, seller added the following information:
I have added a picture of the Brandon Vernonscope lens (second photo, I am holding it) in an attempt to show the condition of the optics. It shows no fungus, scratches or haze but could use a little cleaning. I will not attempt to clean it!