"at a time when manufacturers & others were not yet alive to how much free advertising they were being offered."
This part of Michael's assessment is more than a little curious actually.
Similar series of the period clearly demonstrated that manufacturers were very much alive to the possibilities.
Herbs' contemporaries like the big Gerry Anderson creations,Gordon Murray's Trumpton Trilogy and the Magic Roundabout all showed what was possible.And Watch With Mother predecessor Muffin the Mule had a whole raft of stuff out as early as the 1950's.
Of all of them,the 3 Trumptonshire series were probably the most comparable.
Like The Herbs,they were independantly commissioned by the Beeb for the Watch With Mother slot.They were all made using 3d stop motion animation and enjoyed comparable success.Oh,and like Bond,Mr.Murray had been on Auntie's payroll for most of his working life -although as part of the puppetry department rather than as general cameraman.And both got their series commissioned only a short time after having left.(their decisions btw !)
So plenty of symmetry,but when it came to the merchandising that's where the similarities ended.
Camberwick Green,Trumpton and,to a much lesser degree,Chigley spawned everything from the inevitable books and toys, right through to toothpaste and novelty soaps,and most things in between.
And whilst kitchen sink merchandising meant there were some frankly pretty tacky things produced,at least the cash registers kept ringing.And you don't need to be an accountant to work out who lit the fattest cigar.
Kerrrr......ching !!