2 Vintage Pickett USA Slide Rules & Cases Model 120 & 121 Plus User Manual, Box. Here are two very nice vintage slide rules made by the picket company in Santa Barbara. The set includes a yellow Microline 120 and a white Microline 121. Both are in great condition with no damage. Both come with their original cases. Also included is one how-to manual for basic slide rules. Nice opportunity to pick up two of these! Please check out our other listings. Thanks!