Compass sights or vanes probably homemade pinned and soldered together with thumb screws. 907 wide, foot is 1.270 long. Corrosion is probably from the solder flux.
If UPS leaves it on your door step I will not be responsible for theft. Something that may be insignificant to me may be important to you and I may miss it. Please pay attention to the tracking, Dont let someone to steal it off your porch. The item "Surveor's Compass Sights or Vanes Surveying Brass Vintage" is in sale since Friday, November 30, 2018. This item is in the category "Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Other Antique Science Equip".
The seller is "allwaysup" and is located in Weaverville, North Carolina. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Viet nam, Uruguay, Luxembourg, Macao, Peru, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Turks and caicos islands, Bangladesh, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Monaco, Martinique, Nicaragua, Pakistan, Paraguay, Canada, South africa, Colombia, Antigua and barbuda, Saint lucia, Barbados, Bermuda, Cayman islands, Sri lanka, Maldives, Oman, Reunion, Montserrat.