Hastings triplet.

BC1969

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There's quite a number of them listed at Amazon.
 

The ‘Hastings Triplet’ is a range of magnifiers, not a single product. The loupe range is listed on the B&L website at the first link below and authorised stockists are listed at the second (‘where to purchase’) link:

https://www.bausch.com/our-products...sional-magnifiers/hastings-triplet-magnifiers

https://www.bausch.com/our-products/vision-accessories/where-to-buy-low-vision-products

I only checked the first stockist (AAA Industrial Supply) so I haven’t done a price comparison but they have the full range of 7X, 10X, 14X and 20X currently available at prices ranging from $33.45-$39.95:

https://www.aaaindustrialsupply.com/magnifiers.aspx
 

The ‘Hastings Triplet’ is a range of magnifiers, not a single product. The loupe range is listed on the B&L website at the first link below and authorised stockists are listed at the second (‘where to purchase’) link:

https://www.bausch.com/our-products...sional-magnifiers/hastings-triplet-magnifiers

https://www.bausch.com/our-products/vision-accessories/where-to-buy-low-vision-products

I only checked the first stockist (AAA Industrial Supply) so I haven’t done a price comparison but they have the full range of 7X, 10X, 14X and 20X currently available at prices ranging from $33.45-$39.95:

https://www.aaaindustrialsupply.com/magnifiers.aspx

Which one is best for looking at coins?
 

Which one is best for looking at coins?

Personally, I find 10X magnification to be the most satisfactory for deciphering legends, mintmarks, designer initials (and hallmarks on jewellery). Even 7X is good enough for most purposes. Higher magnifications may be more useful for examination of die varieties or looking for the signs of fakery.

That's only for pocket-use when 'on-the-go' though. For home use I find a small USB scope more useful, with the added advantages that you can hold the image steady using the small stand that comes with most of them, adjust the angle of illumination more easily, and capture the image as a jpeg for computer-enhancement. Sometimes you see things more clearly by converting the image to false colour, negative, greyscale or whatever. I use an inexpensive model from Celestron, but there are a number of similar models from other makers.
 

I use three on a regular basis. 7x, 10x, and 14x. Each has its purpose. The 7x works well for most examinations of jewelry due to a slightly wider field. 10x for most coins. 14x when needed, especially checking heavily worn marks. All three would accompany me when I went on personal explorations of central Nevada. Very handy in helping identify minerals, ores, small artifacts.

Time for more coffee.
 

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