Had's McCulloch Chainsaw Shop -- Monster Models Triple J

[Mr Fixit]

Think those are cinder blocks not "center" blocks. Worked at Angeles Block in Fontana CA where those were made for walls & fences. They are used a lot for "sound" walls along freeways here in CA. Ended up being a sawman there cutting them in half to be put on the end of a line blocks since the rows are staggered like on your model.

You mean to say Andy that they didnt cast 1/2 blocks?
I would have thought and I think I can remember seeing 1/2 blocks on site as an apprentice carpenter. If my memory is correct then the halves would usually come on a separate pallet along the lines of one pallet of halves per truck load. The trucks were tandem steer/ tandem drive cab over models with a palfinger crane at the tail end of the tray with fold down caged sides for road transport. Now days the trucks tend to be a truck and dog combination with either a three wheel self loading tailgate loader forklift or a four wheel drive forklift and rear ramps to load the forklift.

Mind you the market for Besser concrete blocks has taken a big hit with the increase in the use of precast panels.
There are now panels made of sheets of cement sheet [about 1/2 inch thick] either side of slightly modified pressed metal wall studs which once the wall is assembled and braced is filled with fresh concrete.

Mark