Ok, I'm going out start by saying , no i didn't find this Metal Detecting , lol. Anyways, I bought this a long time ago with case, booklet ( the bells an whistles ). El Cazador 2 reale 1783 . I just wanted to know about it and what it may be worth ?
No problem. Most of your questions of value can be looked up on Numista the website. Once you know the country, the region (select all) and the denomination and year you can look up any coin and get the silver content and many times the value will be privided. The NGC website is usefully for world coin values as well.
Ok the suggestions about sites that list values do not necessarily apply to damaged examples, from seawater exposure or otherwise. Look at sold listings on ebay to get a better feel for what folks will pay for these. Also Dan Sedwick's auctions have some examples like this.