Vintage Recipe Ralph™ Recipe Adjuster, Original 1970s circa, Not a Reproduction For Sale

Have many for sale. Recipe Ralph™ Vintage Recipe Adjuster Wheel from the 1970s. Made in the U.S.A. Used for altering recipes to increase or decrease servings and measurements of recipe ingredients effortlessly and accurately. Easy to follow instructions printed on wheel front and back that can be seen in all photos. These have never been used and are in mint condition. Each adjuster is always shipped in its own original yellow envelope (as shown in photos # 5 & 6). Therefore, each single purchase contains 2 items. The envelope was custom made to fit the Recipe Ralph™. Wheel is 6-1/4" dia. with a 1-3/8" point for holding while using and can be used for hanging adjuster on a hook. It is possible to purchase 1 or more; simply indicate how many you want. Great hostess gift, house warming gift, stocking stuffer - a gift for any occasion.Recipe Ralph™ was originally developed and patented in the 1940s by W.P. Dubbs, Palo Alto, CA. Copyright of adjustment wheel; 1947. Based on the concept of the slide rule, this handy kitchen tool was used in the kitchen before access to the technology we rely on today. [Note: The first version was printed as a short cardboard slide rule. Later the form of a proportional wheel proved to be a better design for this purpose.] Developed and Printed in the U.S.A. - Made in the U.S.A.This Recipe Adjuster is printed on heavy, sturdy plastic is the 4th version of Recipe Ralph™ produced. Eight versions were produced over a 40 year period. This wheel is original from the 1970s and not newly reprinted. Each Recipe Ralph™ Recipe Adjuster is a VINTAGE ORIGINAL IN MINT CONDITION AND IS NOT A REPRODUCTION. Vintage yet considered "new". Never used, never displayed, never handled, never exposed to sunlight (except a few used for above photos to be taken). No scuffs, no cracks, no tears, no warping, no stains. Due to quality and storage, the sturdy plastic has remained in excellent condition and does not show signs of age. All available Recipe Ralph™ Adjusters of this version are printed in green, yellow and white with black lettering, as shown in all attached photos.There are dozens that have been stored by family in boxes, in a non-smoking environment along with the custom envelopes since being produced. All Recipe Ralph™ Vintage Recipe Adjusters are in the same condition as those in these photos. Please view all photos for item condition and quality.