World silver crown-size type coin collectors?

1937 Netherlands 2 1/2 gulden

 

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Just a quick post about solvents, oils and cleaning. First, to emphasize that abrasive cleaning is a no-no except for ancients, and even there...BE CAREFUL. For solvents, the best to start with is usually water (most polar) which will take away dirt, grime and salts, next could be alcohols (either ethyl or isopropyl work and as close to 100% as you can get is best) or bypass these and go to acetone. If this don't get you where you want to go, the next step is hydrocarbons (non-polar). The best known hydrocarbons are xylene (xylol) or toluene (toluol), but toluene is more volatile and can be more toxic, be careful. Other hydrocarbons work too, including hexane and petroleum ether (know what you are doing). After cleaning the coins, to increase the presentability, it was suggested to use mineral oil. Mineral oil is a hydrocarbon just like hexane, but it takes it MUCH longer to evaporate. I am not sure if it would fog the interior of any holder the coin is put in. I have been wondering about Linseed oil. Linseed oil is the oil used in oil-based paints and it reacts with oxygen in the air to make a plastic coating. Any comments

 

Linseed oil will make a nearly plastic coating. I have used it to paint farm equipment, and it lasted for years outdoors in a rainy climate. How about using olive oil and a soft tooth brush to clean coins? I have done that a few times and it worked fairly well. I washed the coins afterward with dish washing soap and dried them with a soft cotton towel.

 

1889 P US 1 dollar

 

1938 Netherlands 2 1/2 gulden

 

@coin_nut I wouldn't clean any coins.....I shudder thinking about the coins you've cleaned!

 

Don't shudder too much, I have 'cleaned' very few coins. Let me see if I can find an example...Could use a bit more tooth pick work I see...

 

Is that the before and after?

If so, I'm OK with that.

 

Yes, before and after.

 

Germany BRUNSWICK-LUNEBURG-CELLE Christian the Elder Death Taler 1633

Christian was Bishop of Minden as well as Duke in Celle.





Since it is July 4, I thought I should add a coin of George III, under whom England lost her American colonies. However, it is only a Shilling so strictly it does not qualify for this thread.

 

Ah - what you need is one of these:

 

Exactly !

 

That's a hard act to follow, Paddy. Here is another of my old Morgans, 1896 P US dollar.

 

1651 Mansfeld thaler

 

1717 Vienna thaler

 

1939 Canada 1 dollar

 

thanks! very good to know your input.

 

never seen so many thalers! Very nice. Afraid to say i know next to nothing about them, other than the fact that "dollar" borrows from "thaler," right?

 

Right.
Thal (or, in modern German, Tal) means Valley. Some of the first of these large silver coins were struck in the early 16th century from silver mined in the Joachimsthal (Joachim’s Valley ) and got the name Joachimsthaler. Thaler or Taler became the name of similar coins struck across across Germany and the Holy Roman Empire for the next 350 years or so. Similar large silver coins were struck in Italy (Tallero), Netherlands (Daalder), Sweden (Daler), France (ecu), England (crown), Scotland (ryal), Spain (real) and, of course, the U.S (dollar).

If you are interested in the full story, look up Thaler on Wikipedia.

 

To be accurate, the Spanish and Spanish-American ‘talers’ are not one real but 8 reales, the ‘pieces of eight’ of pirate legends.