Biros?? Never heard of any Biros in the USA. Is it something I need to know about or am I best kept in the dark? Right now I am in the dark until I can find which flue(s) is(are) leaking in my locomotive. Anyone want to help me lay the lokie on its side so we can roll the offending flue(s)??? First ball pen was the "Reynolds Rocket" which came with a stamped alumimium desk cradle with wings on it. Entire alumimium tube of the pen was filled with ink and supposed to last two or three years. Ball socket wore out after a year and the ball was lost so I used the ink as "Hi-Spot" blue for many years. Worked very good for hand scraping valve seats on steam engine models. Jesse, in Tennessee > It is a brand name for a type of modelling clay and has now become generic, > like biros and ballpens, Al. > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.