Who cares, right?

That's not really my question for I do know that some folks out there in Icon land do. In fact I've sold a jamed full large flat rate box of them to someone. Don't recall who that was off hand. But anyhow, let me get to my point and question/questions. Any help would be appreciated.

Earlier on in my collecting history it was explained to me that both Hemingray and Brookfield made this CD number and you could tell who made which by looking at the direction the wire grooves were made in relationship to the embossing. My pic is an example of that explaination if it were that simple and true. However, when I was looking these two over closely I noticed something about the embossing that made me wonder whether or not what I heard in the past was correct. These two insulators do have one other difference. That would be the slope or flare of the skirt below the wire groove. But when I look at the OCT. 8TH 1907 embossing it looks identical. In fact the 9 of 1907 are exactly the same and they look different then the 9's on the other 4 remaining 147's I have. Those four remaining insulators have the wire grooves and embossing going in the same direction as the insulator on the right. Not that that is important here.

With that explained it is time for my question/ questions. Is it true that Hemingray and Brookfield made their wire grooves going in the opposite directions purposely in order that they could be identified while in use? Or, is that just assumed? Is there any factual historical evidence of that be true such as litature produced by the makers (Hemingray or Brookfield) to back up what I was told long ago?

Thanks for all the responses I received. All agreed that both these insulators are Brookfield products regardless of the direction of the wire grooves in relations to the embossing. I've learned the primary difference between the Brookfield CD 147's and the Hemingray's is the OCT. 8TH 1907 embossing. Hemingrays don't have the TH after the 8 and the edges of the wire groves are more sharply defined, where as the Brokfields are more rounded edges.