Identify unknown DBR

[sam_white]

May well have found it's long lost cousin - A British Eagle BOSS. These frames have almost certainly come from the same factory, and yes I'm still riding around on this regularly.

 

[sam_white]

Quick question. I've just been browsing ebay and noticed a Marin with a headtube sticker the same as mine - see pic, with a 'CYC' number on it. I always assumed this was my frame number, but I'm not so sure now. Could it be some kind of tagging scheme like datatag? The sticker and font on mine look identical, although obviously the number is different.
Ebay auction is https://www.ebay.co.uk/itm/Marin-Sausalito-Vintage-Hybrid-Shimano-STX-21-Gears-/304000811186

 

[sam_white]

The Datatag company have indeed confirmed that it is a Datatag number, and have also confirmed that it isn't marked as stolen.
For £20 they can register it in my name and send me the data they have on it.

 

[sam_white]

They don't always help much, but I've found the actual frame number. At the bottom of the seat tube, non-drive side.

Also some 'patina'.

AM9612130 for reference.