what hive is this

[newportbuzz]

what brood box is very similar to a national hive but the internal dimensions are slightly larger.
the internal dimensions are 394mm wide
436mm long
225 deep


it looks like a national ie(handholds)
when i put a national frame in the box there is beespace on one side and 28mm on the far side.
any help would be kindly apreciated as i will have to source frames for the hive.
thanks in advance

 

[Black Comb]

Well at first I thought it was a Smith as it's rectangular and the same depth as a national but a Smith takes national frames (I think) so someone with more experience needed here.

 

[RoofTops]

What length top bar would fit?

 

[newportbuzz]

the hive is square on the outside the only rectangular dimensions are internaly just like the national ill mesure the topbar now. the top bar is 450mm
the bottom bar would have to be 377mm
and overall its 470mm square external

 

[Black Comb]

Sounds like a commercial but my notes say the top bar is 17 1/4" (438mm) but would need someone to verify.

 

[Mike a]

http://www.beekeepingforum.co.uk/picture.php?albumid=120&pictureid=1006

Home made Commercial ?