Bought this group of old wrenches going cheap on EBay from Melbourne because I thought one was Bahco. It was not disclosed as such, and rust covered the marking. Fortunately I was right.
Its a late Series 1 (1892-1915) as it has parallel sides however shaft is thinner at the end, dates it as between 1910-1915, The shaft hole is a bit uneven and has a different chamfer on each side so I think its un-original or a modified hole. The last of these had a shaft hole but it was punched. Cleaned up well with rust converter and steel wool. My oldest and yet cheapest to date...