[You can click on any of the photos to enlarge for more detail]
If you are a letter writer and especially a letter writer who uses a fountain pen there are a full tools which you should have in your arsenal. Above are mine.
This is my lovely wax seal, with the handle made by Brian Goulet of Goulet Pens. The seal itself is from The Design Station. I really love the vast variety of seals that they offer. Mine is a Celtic Double Dog design.
And of course, what good is a wax seal without sealing wax. I have some Herbin flexible was that I acquired from (again) Brian Goulet of Goulet Pens. The standard wax, which I actually prefer is from (again) The Design Station.
Now, if you are going to properly open a letter you need a proper letter opener. Mine is a wooden knife, which I located at a local stationery shop. The only thing that I can tell you is that it is Made in Montana.
[edit: These letter openers may be found at PensandLeather.com - they are from Seldom Seen Knives]
Lastly, the small white item that you see in the first photo. This is simply a white candle, yes a white candle. Essential to the protection of addresses on envelopes and the writing on postcards. After the ink has been blotted and dried you can apply a light coating of wax and your ink will be protected from the elements.
So there you have it, my "essential tools" if anyone else has some, please share.