I've never run across that particular cross and there are so very many hybrids. But let's look at the parents for ideas. Your plant is a cross between Oncidioda Charlesworthii (itself a cross between Cochlioda noezliana and Oncidium incurvum) and Oncidium maculatum.

So, the fragrances in your cross:
- mild honey or lilac from the incurvum
- lily of the valley from noezliana
- mushrooms from the maculatum

Your plant could be a version of any of the above, a combination of any or a new fragrance, but it's a start.

Good luck!

Julie

Here is a link that might be useful: RHS -

Ok, the name of the link above is missing something. If you want to do a parent search, click on the RHS link above and select "Grex name search".