Some time ago a British guitar magazine ran an article on some of Phil's basses that were for sale. Complete with pictures. There was also an article in an issue of bass player. http://www.bassplayer.com/article/ph...ighning/148748
Which says the following:
Though Phil Lynott is most often associated with two particular Fender Precision Basses (stock models with rosewood and maple necks), he played a wide variety of other axes throughout his career. In the early days, he favored Rickenbackers, plucking both 4000 and 4001 models. He also played a Dan Armstrong lucite bass, in addition to Ibanez Roadstars and Blazers. Later, he used a Roland G-88 Synth Bass with the electronics removed.
Most of Lizzy's gear was in storage in London when Phil passed away. Some of it appears to have been sold or "liberated" not long after his sad demise. For example, one of his radio wireless sets was doing the rounds for quite some time.
Personally, I think it is highly unlikely that this is one of his basses. Unless there is photographic evidence of him playing it I wouldn't touch it with a barge pole.