Thank you for looking, but it's not. The one Dad had was closed tube like that one, but the axle tubes bolted on the side bells with a flange rather then pressed in like that one. Almost all of the Franklands of that era were like that one on e-bay. And I have one like that in the shop. I used to have an old catalog that showed the correct one, but I can't find it any more or I'd post a picture. Leave it to Dad to have the odd one.

Tom