I don't claim to be an expert, and its difficult to tell, but it looks 024(ish) to me
http://rvreekum.home.xs4all.nl/ty07g.html but that would have been a 96 car
The 025 had a much thicker underbody central strake on to which the front wing was attached for a start & I doubt it would be easy to change that.
http://rvreekum.home.xs4all.nl/ty07g.html
However, to put a spanner in the works, I wonder if it is a Minardi. I'm sure that when Paul Stoddart bought Minardi & had to get a team on to the grid at very short notice he had already bought the remnants of the Tyrrell team & I have a feeling that I read somewhere that his first "Minardi" was essentially the based on the design of a never raced Tyrrell "027". The Minardi 2 seaters were certainly based on the Tyrrell 026