Thanks again for the response.

The head badge info is Cresent, Waasa and Oy G.L.Hasselblatt who probably sold and may have manufactured the bike.

I've had this bike for about 7 years and just always assumed that it was related to the Swedish make. But the fact that names are spelt differently may have in fact been an effort by G.L.Hasselblatt to associate a Cresent Extra with a Swedish Crescent.