Hey Six. Sorry, the avocado green phone is in a landfill in Canada. I am certainly not a scientist. LOL. Tool & Die. I build automation machines. Funny you mention safety razors as I did some of work with a large razor company in Boston. I have about a year's worth of fancy blades left . I will be going to a safety razor as well. My slide rule was actually in demand in 1999 as the Y2K scare had people thinking their calculator would not work in 2000. The model I have was going for $700 to $900. Worth about $20 now. Cool that you enjoy old sh@t too. Good luck, I am still long Lightwave