Fuse for '67 Ampeg B-15

[Lagaupia]

I need to replace a fuse in a '67 B-15. The fuse holder and fuse popped out and were misplaced in transit so It's not available for reference. On the back of the amp it simply says "3 AMP FUSE". Anyone know whether it's a slow blow or fast acting?

 

[BassmanPaul]

I’d install a normal fuse not a slo blo.

 

[beans-on-toast]

3A, regular fuse, not slo blo.

 

[Lagaupia]

Thanks guys!