Hi Scratchbuilder
Welcome to the site.
Clearly a Scottish inter island steamer.
If you look at
https://en.wikipedia.org/wiki/MV_Arran
you sill see that : "The previous Arran of 1933 was renamed Kildonan, to release the name - she was scrapped on arrival of MV Glen Sannox in 1957".
Its possible the original builder based your model on this vessel (scrapped in 1957) and that could be a pic of the original you have posted.
The Basset-Lowke motor is clearly of some age and value should you wish to replace it with a new motor.
There are lots of links on Google to this subject and hopefully you will be able to find more pics as you research.
Good hunting
Dave