I have previously ordered four supposedly genuine GE MWF online from two separate ebay sellers. All four quit working within a month's time total.
This filter from Redstag Supplies has been in service since 12/24/19 and it is Still working. So I am hopeful that I have found a genuine GE MWF filter.
Shipment from Redstag Supplies was very prompt and shipped free. Great doing business with them.