Hi Scirroco,
The Gecado 50 would have been known as an original 50 in the UK and dates from the 1950s. I would estimate value at around £150
As for the Bell target, well that is interesting. I'm guessing from your query there are no markings on the target to indicate a maker. The electrics would have been for an illuminating lamp (really old ones had gas connections) and I would leave as is, other than maybe a clean up. I need to be careful with a valuation due to forum rules but if the bell mechanism works, I would personally part with £350 for a target like this.
Hope this helps.
John