Are these beans wet or dry processed?

These beans are wet processed/fully washed.

How old are the Columbian Supremo green beans?

A date is not on the package but I can tell you after having roasted hundreds of pounds of beans (over 10 years of roasting) that the beans that were shipped to me were not old .

how fresh are these beans? i.e. when were they harvested, dried etc.?

If they are not shriveled or covered in mold, you can trust that they are ready for roasting. In a covered container or burlap sack, they will keep indefinitely in a dark cool place. Roast enough for a few days or a week because they are best when freshly roasted. Because of medication, I have had to cut back on drinking coffee - even decaf - so the last beans were purchased three years ago. I only indulge once a week so I roast enough beans for two pots and enough to serve expected guests for one week. I usually buy 3-5 pounds at a time. Always get compliments on the coffee I serve.

What grade is this coffee? High grade doesen't mean anything...

Kochere is a small area within the well-known Yirgacheffe coffee-growing region of Ethiopia. Located in the SNNPR (Southern Nations, Nationalities, and Peoples' Region) of southern Ethiopia, Kochere is just south of the town of Yirgacheffe and is 250 miles southwest of Addis Ababa. The area contains washing stations where local farmers can bring their coffee for processing after it is harvested. The iron-rich acidic soil and high altitude of the region are ideal for growing specialty coffee and the Kochere district is known for producing some of the most lively Yirgacheffe coffees in the region. Kochere, Ethiopia 1,798-1,996 m Indigenous heirloomNatural Dried on raised bedsSeptember - DecemberApril - JulyGrade 2