Paul F. [UK] writes:
I voted “none of the above”. I believe that the timer fragment was planted among the evidence at RARDE or at Lockerbie. I suspect that the fragment either came from MEBO after the Lockerbie bombing or else it was manufactured after the Lockerbie bombing and made to look like a MEBO PCB. It is possible that it was manufactured by Matthews and Associates of Florida, who made electronics for the CIA. Interestingly, the company has recently been bought by a UK company.