This object appears to be a vintage nautical knot shadow box or sailors knot display case featuring handcrafted rope knots mounted over a map background with brass-style identification plaques.  
KEY FEATURES
Frame:  A dark wooden storage box with a hinged glass lid and gold-toned interior trim.
DISPLAYED KNOTS
Traditional Maritime Knots
1.  Double Overhand Knot
2.  Figure Eight Knot
3.  Simple Noose
4.  Ring Hitching
5.  Reef Knot
STYLE
Mid-to-late 20th century coastal maritime folk art commonly used as tabletop or desk decor.
This nautical knot shadow box is a classic piece of maritime decorative art.  This display originated as a functional “Knot boards” used by 19th-century sailors and naval academies to teach and practice rigging.  By the mid-to-late 20th century, companies like Daniel Brand and World Bazaars popularized them as home decor.  This specific piece stands out because the knots are arranged as a storage case rather than a flat wall frame, and it utilized a detailed map print background rather than standard soiled felts.
DIMENSIONS
Overall Length:  9.75”
Width:  6”
Height:  4”
STORAGE AREA
Length:  8.75”
Width:  5”
Depth:  2.75”
Weight:  1 lb. 10 ounces
NOTE:  There are nicks and some scratches on this piece due to its age, usage and handling.  All ads character to this piece.
I SHIP USPS GROUNG ADVANTAGE