Small Marine Bronze Block & 90 Deg Shackle; Cryptic Logo

This block weighs ~16 oz; the sheave is for ~1/2 or 3/8 inch line. The shoe-nail is my temporary solution to a missing brass cotter key.
The logo is a capital L within an equilateral triangle within a circle ~1/4" diameter. Google image search ignored the L, , an' said it was for Ithaca Arms; doubtful to me.
The mark may be from a European or North American maker, but I'm fresh out of ideas. Can any of you folks identify the manufacturer of this charming device?
Thanks for lookin'!

 

Here's a similar mark with a C

This is the mark of The Connecticut Foundry (https://www.doorstops.com/foundry/connh.html). Could the L mark be from a foundry in Louisiana?

 

With me GL first said it was a stylized A in a circle. With a second attempt , it said it was a sailing boat within a circle. In both cases Google said it was the logo of Polish weapon manufacturer Perkun

 

seems likely for a ships rigging...

 

Love Industrial,good stuff's sculptural.

 

Two aphorisms, Bosko:

Function is Beauty
Form Follows Function

Those have been my words to live by for 60 years.