L. Leroy was a famous watch maker, bu these are photography related items.

[Lloyd Levine]

Does anyone have any knowledge as to when the L. Leroy company was involved in the photography "business" ?

[Lloyd Levine]

Brevette in French means patent.

I couldn't find any company with the name Brevette SGNG.

The reason I mentioned photography is I bought this from an estate that was owned by someone very heavily in photography. Someone on another site mentioned what they thought these were, but I wanted someone with a "fresh" perspective.

[Lloyd Levine]

Tom,

Thanks for the link. I'll try and use the contact info.

Lloyd

[Molly]

https://en.wikipedia.org/wiki/Brevet%C3%A9_SGDG

[BikerBonnie]

for bridge?

[Molly]

I am not certain people see my posts or links sometimes, but it would be helpful to take note that the correct letters are SGDG, as mentioned in the Wikipedia link above.

[Lloyd Levine]

Molly,

You are "coming in loud and clear" !

[tomsantiquesetcetera]

I deleted my erroneous replies; don't want to confuse people.

Whatever they are they were made in France between 1844 to 1968.

[Lloyd Levine]

The mystery continues....

[Molly]

What are the dimensions?  Do they open?  Could you show you, if so?

[Lloyd Levine]

Dimensions appear in the photos. I'll try and open them later

[Molly]

Oops....yep, there they are!

I think I have found it.

https://www.etsy.com/listing/796023352/antique-photography-plates-n...

https://www.ebay.com/itm/Antique-Film-Sheath-Plate-Holders-Vintage-...

[Lloyd Levine]

Could be! Talk about a big difference in price!