<div dir="ltr">Hi everyone!<div>A family friend is trying to identify the object in the attached image. This is all the information he had:</div><div><br></div><div><div class="gmail-_2FCtq-QzlfuN-SwVMUZMM3 gmail-_2v9pwVh0VUYrmhoMv1tHPm gmail-t3_bo4dhp" style="margin:0px 8px 8px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;font-size:medium;line-height:inherit;font-family:IBMPlexSans,Arial,sans-serif;vertical-align:baseline;color:rgb(135,138,140)"><div class="gmail-y8HYJ-y_lTUHkQIc1mdCq gmail-_2INHSNB8V5eaWp4P0rY_mE" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline;display:inline;word-break:break-word"><div class="gmail-_2SdHzo12ISmrC8H86TgSCp gmail-_29WrubtjAcKqzJSPdQqQ4h" style="margin:0px;padding:0px 5px 0px 0px;border:0px;font-style:inherit;font-variant:inherit;font-stretch:inherit;font-size:20px;line-height:24px;font-family:inherit;vertical-align:baseline;display:inline"><h1 class="gmail-_eYtD2XCVieq6emjKBH3m" style="margin:0px;padding:0px;border:0px;font:inherit;vertical-align:baseline;display:inline">Does anyone know what this was used for calculating? Both rings rotate clockwise freely but lock in this position when rotated counterclockwise. It seems to be a very specific type of calculator but the Google has not been very helpful.</h1></div></div></div></div><div><div style="color:rgb(38,40,42);font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><p>Might deal with weights with the references to 16 (= number of ounces in a pound) </p></div><div style="color:rgb(38,40,42);font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><p>The image seems to be from around 1904 to 1908</p><p><br></p><p>Has anyone seen one of these before? It's from Ontario, around Thunder Bay.</p><p><br></p><p>Thanks if you can help!</p><p>Maureen</p></div></div></div>