Lens Filter Yellow Y3 19mm

This is an old lens filter. Its intended use is unknown.
The case has Y****W SCREEN printed on it, but some characters are unclear.

[Contents]
1. Lens filter, Yellow, Y3
- Dimensions: Front - Outer diameter 26.4mm, Ring diameter 24.4mm, Glass outer diameter approx. 19mm
Back - Outer diameter 26.4mm, Mount diameter 23mm, Glass outer diameter approx. 19mm
Thickness: 7.5mm
*Dimensions are actual measurements
2. Case: Cloth, Y.3. leather sheet, MADE IN JAPAN
Outer diameter 33mm, Thickness 15.5mm

[Condition]
- Some of the black paint is peeling.
- No scratches are visible on the filter glass itself.

★This is an old filter, but I believe it is still usable.
★We hope someone knowledgeable about lens filters can make good use of it.
★Shipping is planned via Yu-Packet mini (anonymous shipping).

Thank you for looking.