Lowe Alpine Systems developed the Tri-Cams and had C.A.M.P. make the originals. Lowe was an American company and Americans commonly refered to these as Lowe Tri-cams. C.A.M.P. referred to these as Lo-Cams. C.A.M.P.'s original engineering drawing for sizes #1 through #4 was completed on June 29, 1981. The original Drawings for sizes #5-#6 and for #7 was completer on July 7, 1981. Half-sizes from 0.5 through #3.5 came later.
Later Tri-Cams were marketed directly by C.A.M.P. The C.A.M.P./Lowe and C.A.M.P. Tri-cams are essentially identical.
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↑ Set 288, …, 411: Lowe/C.A.M.P. Tri–Cams #0.5–#7
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↑ 288: Lowe/C.A.M.P. Tri–Cam #0.5: 24 mm.
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↑ 407: Lowe/C.A.M.P. Tri–Cam #1: 31 mm.
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↑ 289: Lowe/C.A.M.P. Tri–Cam #1: 31 mm.
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↑ 408: Lowe/C.A.M.P. Tri–Cam #1.5: 38 mm.
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↑ 290: Lowe/C.A.M.P. Tri–Cam #1.5: 38 mm.
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↑ 291: Lowe/C.A.M.P. Tri–Cam #2: 46 mm.
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↑ 079: Lowe/C.A.M.P. Tri–Cam #3.5: 62 mm.
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↑ 409: Lowe/C.A.M.P. Tri–Cam #4: 67 mm.
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↑ 332: Lowe/C.A.M.P. Tri–Cam #5: 85 mm.
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↑ 410: Lowe/C.A.M.P. Tri–Cam #6: 101 mm.
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↑ 411: Lowe/C.A.M.P. Tri–Cam #7: 134 mm.
I know no way to distinguish older Lowe/C.A.M.P. vs. C.A.M.P. Tri-cams other than by reading the label. The labels on these Tri-cams are illegible or missing. I believe that these are C.A.M.P rather than Lowe/C.A.M.P. Tri-cams because I obtained them as part of a set wehre all the ones with legible tags were C.A.M.P. Tri-cams.
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↑ Set 073-077: C.A.M.P. (incerta notam) Tri–Cams #0.5–#2.5
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↑ 073: C.A.M.P. (incerta notam) Tri–Cam #0.5: 24 mm.
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↑ 074: C.A.M.P. (incerta notam) Tri–Cam #1: 31 mm.
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↑ 075: C.A.M.P. (incerta notam) Tri–Cam #1.5: 38 mm.
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↑ 076: C.A.M.P. (incerta notam) Tri–Cam #2: 46 mm.
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↑ 077: C.A.M.P. (incerta notam) Tri–Cam #2.5: 52 mm.
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↑ 077: C.A.M.P. (incerta notam) Tri–Cam #2.5: 52 mm.
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↑ 078: C.A.M.P. Tri–Cam #3: 58 mm.
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↑ 080: C.A.M.P. Tri–Cam #4: 67 mm.
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↑ 081: C.A.M.P. Tri–Cam #6: 101 mm.
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↑ 082: C.A.M.P. Tri–Cam #7: 134 mm.