Luger value?

I inherited a luger from my father when he passed away, and was wondering if anyone could give me a general idea of what it is worth. The information I have on it is:


Toggle Inscription: 42 and 55

Chamber Inscription: 655 and 1940

Toggle knob type: squared and knurled

Grip Safety: not present

Stock Log: present

Caliper: 9mm

Grip type: walnut, checkered, no border

Thumb safety: markings: Gesichert; Safe position: rear

Barrel length: 3 1/8 inch

Markings: Right side of chamber- 2 eagles from Parabellum #47(the left eagle)-both over 655 and 1 eagle from Parabellum #47 (the smaller one on the right); Bottom of chamber above trigger guard- 7555 over 8.81 and symbol that looks like backwards lambda; Breechblock- smaller eagle from Parabellum #47(right picture) and symbol I do not recognize-