Memphis 5-String Acoustic/Electric Bass guitar.

[impala59]

I would agree with the above regarding the acoustic bass getting lost when playing with other instruments, I believe that they are probably best used when practicing alone (and as the actions are usually quite awful, when you pick up a regular bass it will feel like silk!)
However, a few years ago I played a few events with an acoustic combo and borrowed a Hohner acoustic fretless bass which sounded lovely and zingy with Ernie Ball slinky bass strings on, to boost the volume in the mix, I simply used my trusty battery Pignose on a strap so I could move around with the guitar, fiddle, snare and banjo players. It was very like a mariachi set-up but playing country, blues and folk stuff. Great fun at the time but I never felt the urge to actually buy an acoustic bass, with a battery amp I could have used a regular bass but the events demanded acoustic instruments.
Good luck with it, it actually looks like a nice instrument, have you considered E as your low string and either B or C as a fifth high string? Could be good for melody and will cut through if playing ensemble

[DrNomis_44]

I would agree with the above regarding the acoustic bass getting lost when playing with other instruments, I believe that they are probably best used when practicing alone (and as the actions are usually quite awful, when you pick up a regular bass it will feel like silk!)
However, a few years ago I played a few events with an acoustic combo and borrowed a Hohner acoustic fretless bass which sounded lovely and zingy with Ernie Ball slinky bass strings on, to boost the volume in the mix, I simply used my trusty battery Pignose on a strap so I could move around with the guitar, fiddle, snare and banjo players. It was very like a mariachi set-up but playing country, blues and folk stuff. Great fun at the time but I never felt the urge to actually buy an acoustic bass, with a battery amp I could have used a regular bass but the events demanded acoustic instruments.
Good luck with it, it actually looks like a nice instrument, have you considered E as your low string and either B or C as a fifth high string? Could be good for melody and will cut through if playing ensemble

Nah, never really considered tuning the 5th string to E, I was going to go with the more standard B, E, A, D, G tuning, since I'm used to playing a 4-string Electric bass, although I can't see why I couldn't give tuning it to E, A, D, G, B a try, I reckon it's a pretty decent instrument but then-again I have little experience with these things, I did notice that the soundboard has warped a bit near the bridge due to string-tension, but it doesn't look too serious, the nut seems fine, I did notice that some of the tuners need new white plastic washers but I think I've got some spares, the fretboard looks like it could do with a bit of a clean and some conditioning, but other than that it looks in pretty good condition.

I think the scale-length is about the same as say for a Fender P-Bass, I'll have to measure it to be sure.

My usual gauge of bass strings is .105 to .050, which I'm currently using on my Squire P-Bass.


Update:

I just measured the scale-length and it is indeed same as for a Fender P-Bass.

Out of curiosity, I got out my trusty Digital Vernier-Caliper and used it to measure the gauge of the remaining 4 strings, and I measured the width of the nut-slot for the missing 5th string, it looks like the following gauges of strings was used on the guitar:

Lowest to highest (Gauge in thousandths of an inch):

5, .119 (possibly .120?)

4, .100

3, .080

2, .065

1, .045