There is a good reason for 66612 not having any Freightliner logos on its bonnet.
A couple of years ago, 66525 caught fire whilst working a train, the loco was taken to Crewe for repairs, one of which was to the bonnet, which had distorted with the heat. the bonnet was sent away to be rebuilt but took longer than expected.
525 was complete repair wise other than having its bonnet back, 66612 was also in for a major exam, so the decision was to release 525 with 612s bonnet.
Alas when 612 was released from exam, the repaired bonnet had arrived back, but no FL logos where available, so it got refitted and sent out.
I actually have the set of big FL logos for it in my office, but as yet we have not got round to fitting them.
So, if 612 is released from Bachmann either with or without big bonnet logos, then both are technically correct.
Hope this clarifies the missing logos!, by the way I was the Flet Engineer for FL(HH) at the time and it was I who authorisd its release and bonnet swap.
Cheers
Ringo