For your consideration - I am offering my Triplett 3444 mutual conductance tube tester for sale. This tester is in excellent working condition. I am not aware of any problems, and have always found this tester to be reliable and accurate.In my opinion, the Triplett 3444 is one of the best portable vintage tube testers, surpassing both the Hickok 539C and the TV series military testers.Please note this does not include the manuals, but those easily be found on en .I will gladly ship worldwide, but please be aware that international shipping can be quite expensive.Please note that, due to the age of the tester I am selling it \"as is\" with no warranties or guarantees expressed or implied.Please do not hesitate to ask me any questions you may have.Thank you and happy offerding!