I am in the UK now and have direct access to my Alimo.
I'm collecting parts to do a renovation and just had a look at what is on the bike already:
The only Shimano 600 part fitted is the crankset. I'm not sure what was fitted originally but there is a Suntour VX rear derailleur fitted now.
The Gear levers are original and are Shimano Altus LT, so is the front derailleur which is mostly constructed in pressed steel.
The brakes are Shimano Tourney with the clamping parts on the right side.
The headset is Tange Seiki and looks like chromed steel.
The original pedals were swapped recently for some Wellgo SPD clipless pedals but will replace the originals which I hope are SR.
So that's how Alimos ended up being so affordable
I will be stripping my Alimo down soon, I'm curious about the frame and fork weight to see if it might actually be Ishiwata 019.
The reproduction stickers should be ready soon, I've ordered 5 sets initially, I asked the printers to match the original colours as closely as possible.