Alt tag missing on Manufacturer module

[cassandra8]

I am missing a alt tag for one module that I cannot seem to get the code right

Does anyone know what might work for this? 

<img src="{$manufacturer.image|escape:'html':'UTF-8' }" alt=""/>

The developer used something like this on the others that I got to work on missing modules but I cannot seem to get this one to work.

{$manufacturer.image->title|escape:'htmlall':'UTF-8'}

Any help would be appreciated!