30 May 2012: three inspiration pics were teased on Facebook
1 June 2012, introducing the Machair collection with pics of Ladybirds Pimpernel and Shui Long Scarista:
“On North and Western seacoasts of Scotland and Ireland a special habitat has slowly evolved by the windswept shell sand overlaying peat soil; the machair. From late May this fertile plain beside the sea bursts into bloom and a glorious meadow is created. Each machair boasts its own diverse species of wildflower in this unique habitat.
This Collection celebrates the beautiful scene; the colours of the wildflowers, sky and sea, all found in one of the rarest habitats in Europe.
Here we present the first two wraps of our collection with lots more colours and fabric blends to come!”
The collection text was edited later that year:
“On North and Western seacoasts of Scotland and Ireland a special habitat has slowly been created by the windswept shell sand overlaying peat soil; the machair. From late May this fertile plain beside the sea bursts into bloom and a glorious meadow is created. Each machair boasts its own diverse species of wildflower in this unique habitat. This Collection celebrates the beautiful scene; the colours of the wildflowers, sky and sea, all found in one of the rarest habitats in Europe.”
4 June 2012: “Think I might need to sit under the Bodhi tree for a little longer for that ray of enlightenment 
We’re just updating something on the website so I don’t want to give a definite time until thats done, but probably we’ll list Ladybirds Pimpernel tomorrow and Shui Long Scarista shortly after.”
22 June 2012, a short break from the collection: “We’re going to take a short break from Machair and list our 2nd ‘high volume’ item (of course this is all part of our grand plan and nothing to do with the fact that our order of cloth bags is two weeks late and we’ve run out 
)”
The collection continued, after Starry Night Lewis, with Shui Long Clover and Eden Orchid as well as Starry Night Thrift.
Oscha introduced the last wraps of the collection on 4 July 2012: “Remaining wraps to come in the Machair Collection. Some lighter-weight 40% linens and one super-heavyweight 50% linen Nouveau, along with a last lightweight silky. The purple is probably a bit more to the red than in most of the pics and more to the blue than in one picture of SN Clover.”
The last batch of the collection included Alto Bluebell, Eden Bluebell, Ladybirds Foxglove, Nouveau Clover, Roses Prunella, Starry Night Clover and Starry Night Forget-me-not.
The final one, ‘the one that we forgot’, was Japanese Knot Chiisai Gentian, introduced on 10 July 2012.
After that, part of the Machair patterns/colours were part of the Machair/Juliet preorder.
The collection closed with a bit of humour: “Someone emailed us with a comment they read; a suggestion to have some T-shirts made with ‘I survived the Machair Collection’ printed on them….
Mike and I would like to ask that you send us a couple too ” followed by a suggestion for the text on the back: “I think you need to change the message on the back, something like ‘and all I got was a stupid error message’.”
Alto Bluebell
Vista blue warp with bleached linen weft gives this wrap a beautiful sheen. 40% linen/60% cotton, medium weight.
£73.00
Eden Bluebell
Vista blue warp with bleached linen weft gives this wrap a beautiful sheen. 40% linen/60% cotton, medium weight.
£73.00
Roses Scarista
Linen cotton ecru warp with verdigris cotton weft, which has a delightful lustre. This sling has a lovely handle, is durable and comfortable….
£69.00
Shui Long Clover
Shui Long, the Tibetan water dragon…. 50% deep, rich bright violet cotton with 50% silvery golden natural linen, medium weight.
£73.00
Shui Long Scarista
Linen cotton ecru warp with verdigris cotton weft, which has a delightful lustre. This sling has a lovely handle, is durable and comfortable….
£67.00
Starry Night Clover
Deep violet warp with a bleached white linen weft…. 50% cotton with 50% linen, medium weight.
£73.00
Starry Night Thrift
Cosy linen cotton ecru warp with pink lavender cotton weft. A beautifully soft and supportive wrap. This sling has a lovely handle, is durable and…
£69.00
Starry Night Thrift Mid Sizes
Cosy linen cotton ecru warp with pink lavender cotton weft. A beautifully soft and supportive wrap. This sling has a lovely handle, is durable and…
£69.00
Eden Orchid
Rich deep violet warp with tropical green cotton weft. A beautifully soft and supportive wrap. 100% cotton. Stunning!
£64.00
Japanese Knot Ceo Ooki
Cosy linen/cotton ecru warp with nuvola blue tussah silk weft. A beautifully soft and supportive wrap. 40% tussah silk 20% linen 40% cotton.
£104.00
Japanese Knot Gentian Chii Sai
Vista blue cotton warp with tropical green cotton weft. A beautifully soft and supportive wrap. 100% cotton. Stunning!
£64.00
Ladybirds Foxglove
Deep violet warp with pink lavender cotton weft. A beautifully soft and supportive wrap. 100% cotton.
£64.00
Ladybirds Pimpernel
Cosy ecru warp with pink lavender cotton weft. A beautifully soft and supportive wrap. 100% cotton.
£64.00
Nouveau Celandine
Deep comfort with linen/cotton ecru warp and ochre tussah silk weft. A beautifully soft and supportive wrap. 40% tussah silk 20% linen 40% cotton.
£104.00
Nouveau Clover
Bright violet cotton with silvery golden natural linen. The combination of the rich colours and the elegant pattern make this a very striking wrap….
£73.00
Roses Foxglove
Rich deep violet warp with pink lavender cotton weft. A beautifully soft and supportive wrap. 100% cotton.
£64.00
Roses Pimpernel
Cosy ecru warp with pink lavender cotton weft. A beautifully soft and supportive wrap. 100% cotton.
£64.00lla
Roses Prunella
Comfy deep violet cotton warp with nuvola blue tussah silk weft. A beautifully soft and supportive wrap. 40% tussah silk 60% cotton.
£98.00
Starry Night Forget-me-not
Vista blue warp with ecru cotton weft. A beautifully soft and supportive wrap. 100% cotton.
£64.00
Strato Adhar
Comfy vista blue cotton warp with nuvola blue tussah silk weft. A beautifully soft and supportive wrap. 40% tussah silk 60% cotton.
£98.00
Later on, new items were added to the Machair collection:
https://www.oschaslings.com/blog/developing-the-machair-collection/