Not sure what type of boat these are from. Each one is marked SE F-100-13. The mounting plates are 3-1/4" by 6-1/4". The holes are 2 on center. The item "Vtg Bronze Brass Speed Tournament Boat Skeg Fin Set of 3 Marine Part" is in sale since Monday, April 25, 2016.This item is in the category "eBay Motors\Parts & Accessories\Boat Parts\Other". The seller is "bobd3751" and is located in Walnut Creek, California. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, PH, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM.