[Answered] What are these little metal clips? [perfboard connection tags]

[Whales]

Smallest subvisions of the scale are mm. 




Found this in an old box from Zephyr, 70 Batesford Road, Chadstone, S.E.10 Melb. Victoria.  The item part number had faded off the box.

One side has teeth, the other does not.  The teeth don't seem aggressive enough nor the metal strong enough to make insulation-piercing vampire taps.

[vk6zgo]

Smallest subvisions of the scale are mm. 

(Attachment Link)
(Attachment Link)

Found this in an old box from Zephyr, 70 Batesford Road, Chadstone, S.E.10 Melb. Victoria.  The item part number had faded off the box.

One side has teeth, the other does not.  The teeth don't seem aggressive enough nor the metal strong enough to make insulation-piercing vampire taps.

They look like the connecting tags used with the old style perf board (called matrix board back then).
It had no copper, just a sheet of perforated phenolic.
The connections were made point to point on the bottom side of the board, & components on the top side.
They were also sometimes used as termination points for external wiring on normal PCBs.

I think the  serrated part (which was not common) was so you could make temporary connections.