Check the listing for details. Set 2 pieces Very Rare Ruler Skiaskopichesky Accommodative LSK-1 USSR. Condition: Used. Listed at 150.00 USD. Vintage USSR Russian Ruler skiaskopichesky LSK-1 set 2 pieces Made in USSR ORIGINAL! Not reproduction! Condition: Very good! Please see photo! Are intended for objective definition of a refraction of an eye. Rulers consist of two rulers with positive and negative lenses with back top of a refraction equal 1, 2, 3, 4, 5, 6, 7, 8, 9 dptr; on everyone the cursor with the positive and negative lenses equal 0,5 and 10 dptr moves.Technical characteristicsLimits of reproduction of a refraction:from-19 to +19 dptr Overall dimensions:405x36x15 mm Weight:0,480 kgNice addition to any collection !I have other antique and vintage items for sale. I will add them every day. Please keep checking my items for sale!!!Please see my other items!For items with a price BUY it NOW boldly offer your price! I'll be happy to send you additional photos and answer your questions before you make your purchase. RULES SHIPPING: As a rule I send the goods on the first day after receiving payment. I really appreciate my business and try to meet all the expectations of the buyer. The deliver time to Europe is about 16-25 days, about 2.5 - 4 weeks in the USA. Australia 30 - 50 days.All goods are sent by air mail service " Ukrposhta", and then deliver to the country of destination by national postal services.All parcels with the track number! FEEDBACK POLICY: We will leave feedback for each order. Please contact us before sending negative or neutral feedback. We would like to solve any problems. RETURN POLICY: In case of any problems or questions please contact me and I will do my best to make you satisfied! You have 100% guarantee and refund. I accept returns within 30 days in my original packaging and provided that the item has its original condition as received. Buyer pays shipping and all additional charges such as taxes and customs fees. The shipping fee is not refundable. Our goal is to make you a satisfied customer, and we will do our best to make it happen. Please do not hesitate to contact us for any questions that may arise regarding your order or any of our products. We are here to help, and we look forward to your satisfacton with our products. Look my other sales Thanks for visit my store…