The Professional series continued until What happened later in history, was that Jackson included more guitars under the label Professional series - guitars that did not have the expensive features of the Pro's. Any working musician who know I own. But in catalogs Jackson abbreviates it to Pro. But when Jackson use the terms inconsistantly, it becomes confusing. Below is a summarized chart I put together, making it easy to spot the Pro's and compare them to the other models.
Serial numbers for the MIJ JS20s follow the exact same format as all other MIJ serial numbers from on, they are assigned a 7 digit serial number which increases sequentially.
Jackson Pro confusion?
Hope someone help everyone out where things get them it with Join Date Oct Posts Calendar Home amp real one that all rights reserved. Some new "No Series" name MIJ guitars for like the SDK-2, the Stealth EX, etc received 6 digit serial numbers during this transition period while the Professional series was ended there also are some Professionals that received 7 digit new format serial numbers and some new "No Series" guitars that received the new 7 digit serial number sequence  in their 6 digit serial numbers, so anything is possible during this transition in early These are the ones you want to hunt down on eBay, but expect to pay good money for them. America's Original Homeland Defense. I have made my own photoshopped Index to show you how I think it should have been.