In November 1938, Vicente Lliveria Grau served in the 1^a/26, which was equipped with the Polikarpov I-15.

On 3 November, he claimed a Bf 109.
The Escuadrilla also claimed a twin-engined bomber during the day.

Lliveria ended the Spanish Civil War with 1 biplane victory, this one claimed while flying the Polikarpov I-15.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1938
	03/11/38		1	Bf 109	Destroyed	I-15			1a/26

Biplane victories: 1 destroyed.
TOTAL: 1 destroyed.

Sources:
Spanish Republican Aces – Rafael A Permuy López, 2012 Osprey Publishing, Oxford, ISBN 978-1-84908-668-4