For a bit of history on the older Stanley Hand Plane Models try this site, lists all models from 1867 and identifying features: How To Identify Stanley Hand Plane Age And Type (Type Study Tool) | Wood And Shop
I purchased a Record Power DML305 from www.dm-tools.co.uk, couldn't quite strech to the Coronet. They have the Wnter discount prices currently being offered from Record power (be quick as I think it ends 1st March). DM-Tools service was good, I got my lathe delivered with 3 days and the...
Cut enough out with a multitol to get a Panel saw in there (Rip rather than crosscut if you have one) and do the rest with that. Using a drill and carfully adding pilot holes before the multitool may help with dust removal.