The handle shape looks exactly the same as my Rooney 1/2. Block lettering and knot shape are the same too. Mine was stamped Genuine Silvertip Sterilised Made in England although this has since worn off. I’ve never owned a Vulfix so I can comment on that. looks like you got a lovely looking brush there whoever made it.
Can generally tell by the lettering, if the printing is fine quality then it's Rooney, if it's poor and begins wearing off within a month then it's Vulfix. Likewise with the knot, if dense and firm with soft tips it's a Rooney, if sparse, floppy and scratchy it's a Vulfix.
This brush looks to be over 10 years old and therefore without a close examination of this brush we can be sure of its full complete origins.
Kindest regards,
Michael
Taylor of Old Bond Street
74 Jermyn Street,
St James's, London
SW1Y 6NP, England
Tel: +44 (020) 7930 5544/5321
Email : sales@tobs.co.uk
Website: www.tobs.co.uk